From 6d22393da387ca834befeb182e8b6d17e3b3a0be Mon Sep 17 00:00:00 2001 From: Brian Buller Date: Tue, 13 Dec 2022 10:08:27 -0600 Subject: [PATCH] 2022 Days 12 & 13 Complete! --- 2022/day12/input | 41 ++++ 2022/day12/main.go | 87 +++++++ 2022/day12/problem | 109 +++++++++ 2022/day12/testinput | 5 + 2022/day13/input | 449 +++++++++++++++++++++++++++++++++++ 2022/day13/main.go | 277 +++++++++++++++++++++ 2022/day13/problem | 203 ++++++++++++++++ 2022/day13/testinput | 23 ++ helpers/coordinate.go | 3 + helpers/coordinateByteMap.go | 64 +++++ 10 files changed, 1261 insertions(+) create mode 100644 2022/day12/input create mode 100644 2022/day12/main.go create mode 100644 2022/day12/problem create mode 100644 2022/day12/testinput create mode 100644 2022/day13/input create mode 100644 2022/day13/main.go create mode 100644 2022/day13/problem create mode 100644 2022/day13/testinput diff --git a/2022/day12/input b/2022/day12/input new file mode 100644 index 0000000..d469653 --- /dev/null +++ b/2022/day12/input @@ -0,0 +1,41 @@ +abcccaaaaaaccccccccaaaaaccccccaaaaaaccccccaaaaaaaacccaaaaaaaccaaaacccccccccccccccccccccccccaaaaaacccccccccccccccccccccccccccccaaaaaa +abcccaaaaaacccccccaaaaaaccccaaaaaaaacccccccaaaaaaaaaaaaaaaaccaaaaacccccccccccccccccccccccccaaaaaacccccccccccccccccccccccccccccaaaaaa +abccccaaaaacaaaccaaaaaaaacccaaaaaaaaacccccccaaaaaaaaaaaaaaaacaaaaaacccccccccaaacccccccccccaaaaaaaaccccccccccaaccccccccccccccccaaaaaa +abccccaaaaccaaaaaaaaaaaaacccaaaaaaaaaacccccaaaaaaaaaaaaaaaaaaacaaaacccccccccaaaacccccccccaaaaaaaaaacccccccccaaaccccccccccccccccccaaa +abcccccccccaaaaaacccaacccccccccaaacaaaccccccaacccccccaaaaaaaaacaacccccccccccaaaacccccccccaaaaaaaaaacccccccccaaaccacaaccccccccccccaaa +abcccccccccaaaaaacccaacccccccccaaacccccccccccccccccccaaaacaaaacccccccaacaaccaaaccccccccccaccaaaaacacccccccccaaaacaaaaccccccccccccaac +abccccccccccaaaaacccccccccccccccacccaaaacccccccccccccaaaacccccccccccccaaaacccccccccccaacccccaaaaccccccccjjjjaaaaaaaaaccccccccccccccc +abccccccccccaaaacccccccccccccccccccaaaaacccccccccccccaaaccccccccccccccaaaaacccccccccaaaaaacccaaccccccccjjjjjjkkaaaacccccccccaacccccc +abcccccaaccccccccccccccccccccccccccaaaaaacccccccccccccaacccccccccccccaaaaaaccccccccccaaaaaccccccccccccjjjjjjjkkkkaacccccaacaaacccccc +abccaaaacccccccccccccccccccccccccccaaaaaaccccccccccccccccccccccccccccaaaacaccccccccaaaaaaaccccaacccccjjjjoooookkkkkkkklllaaaaaaacccc +abccaaaaaacccccccccccccccccccccccccaaaaacccccccccccccccccccccccccccccccaaccccccccccaaaaaaaaccaaaaccccjjjoooooookkkkkkkllllaaaaaacccc +abcccaaaaacccccccccccccccccccccccccccaaaccccccccaaaacccccccccccccccccccccccccccccccaaaaaaaaccaaaaccccjjooooooooppkkppplllllaccaacccc +abccaaaaaccccccccccccaccccccccccccccccccccccccccaaaacccccccccccccccccccccccccccccccccaaacacccaaaacccijjooouuuuoppppppppplllccccccccc +abcccccaacccccccccccaaaaaaaaccccccccccccccccccccaaaaccccaaccccccccaaacccccccccccccaacaaccccccccccccciijoouuuuuuppppppppplllcccaccccc +abcccccccccccccccccccaaaaaaccccccccccccccccccccccaaccccaaaacccccccaaaaccccccccccaaaaaaccccccccccccciiiiootuuuuuupuuuvvpppllccccccccc +abcccccccccccccccccccaaaaaaccaaaaacccccccccccccccccccccaaaacccccccaaaaccccccccccaaaaaaccccccccccccciiinnotuuxxxuuuuvvvpppllccccccccc +abccccccccccccccacccaaaaaaaacaaaaaaacccccccccccccccccccaaaacccccccaaacccccaaaaccaaaaaccccaaccccccciiiinnnttxxxxuuyyyvvqqqllccccccccc +abcccccccccccaaaaccaaaaaaaaaaaaaaaaaaccaacccccccccccccccccccccccccccccccccaaaacccaaaaaccaaacccccciiinnnnnttxxxxxyyyyvvqqqllccccccccc +abaaaacccccccaaaaaaaaaaaaaaaaaaaaaaaaaaaacccccccccccccccccccccccccccccccccaaaacccaaaaaacaaaccccciiinnnnttttxxxxxyyyyvvqqmmmccccccccc +abaaaaccccccccaaaaacccaaaaacaaaaaacaaaaaaccccccccccccccccaaccccccccccccccccaacccccccaaaaaaaaaaciiinnnnttttxxxxxyyyyvvqqqmmmccccccccc +SbaaaacccccccaaaaaccccaaaaaccaaaaaaaaaaaccccccccccccccccaaacaacccccccccccccccccccccccaaaaaaaaachhhnnntttxxxEzzzzyyvvvqqqmmmccccccccc +abaaaacccccccaacaacccccaaaaaaaacaaaaaaaaaccccccccccccccccaaaaaccccccccccccccccccccccccaaaaaaacchhhnnntttxxxxxyyyyyyvvvqqmmmdddcccccc +abaaaacccccccccccccccccccaaaaaacaaaaaaaaaacccccccccccccaaaaaaccccccccaaaccccccccccccccaaaaaaccchhhnnntttxxxxywyyyyyyvvvqqmmmdddccccc +abaacccccccccccccccccccaaaaaaacccccaaaaaaacccccccccccccaaaaaaaacccccaaaacccccccccccccaaaaaaacaahhhmmmttttxxwwyyyyyyyvvvqqmmmdddccccc +abcccccccccccccccccccccaaaaaaacaaccaaacccccccccccccccccaacaaaaacccccaaaacccccccccccccaaacaaaaaahhhmmmmtsssswwyywwwwvvvvqqqmmdddccccc +abcccccccccccccccaaaccccaaaaaaaaaacaaccaaccccccccccccccccaaacaccccccaaaacccccccccccccccccaaaaacahhhmmmmmsssswwywwwwwvvrrqqmmdddccccc +abcccccccccccccaaaaaaccccaaaaaaaaaccaaaacccccccccccccccccaacccccccccccccccccccccccaaaccccaaaaaaahhhhhmmmmssswwwwwrrrrrrrrmmmmddccccc +abcccccccccccccaaaaaaccccaaaaaaaaaaaaaaaaaccccccccccccccccccccccccccccccccccccccaaaaaacccccaaaaachhhhhmmmmsswwwwrrrrrrrrrkkmdddccccc +abccccccccccccccaaaaaccccccaaaaaaaaaaaaaaaccccccccccccccccccccccccccccccccccccccaaaaaaccccaaaaacccchhggmmmssswwrrrrrkkkkkkkkdddacccc +abccaaaacccccccaaaaacccccccccaaaaaacaaaaacccccccccccccccccccccccccccccccccccccccaaaaaaccccaacaaaccccggggmmsssssrrlkkkkkkkkkdddaccccc +abccaaaacccccccaaaaacccccccccaaaaaaccccaacccccccccccccccccccccccccccccccccccccccaaaaaccccccccaaccccccgggmllssssrllkkkkkkkeeeddaccccc +abccaaaacccccccaaacccccccccccaaaaaacccccccccccccccccccaacccccccccccccccccccccccaaaaaacccccccccccccccccggllllssslllkkeeeeeeeeeaaacccc +abcccaaccccccccaaacaaaccccccaaaaaaaaaaacccccccccccccaaaaaacccccccccccccccccccccaaacaaacccccaacccccccccggglllllllllfeeeeeeeeaaaaacccc +abccccccccccaaaaaaaaaaccccccccccccaccaaaccacccccccccaaaaaaccccaaccaacccaaccccccaaaaaaacccccaaccccccccccggglllllllfffeeecccaaaaaacccc +abccccccccccaaaaaaaaacccccccccccccccaaaaaaaccccccccccaaaaaccccaaaaaacccaaaaaaccaaaaaacccaaaaaaaacccccccggggllllfffffccccccaacccccccc +abcccccccccccaaaaaaacccccccccccccccccaaaaaaccaacccccaaaaaccccccaaaaacccaaaaaacaaaaaaacccaaaaaaaaccccccccgggffffffffccccccccccccccccc +abccccccccccccaaaaaaacccccccccccccaaaaaaaaacaaaaccccaaaaacaaaaaaaaaacaaaaaaacaaaaaaaaaccccaaaacccccccccccggffffffacccccccccccccccaaa +abccccccccccccaaaaaaacaaccccccccccaaaaaaaaacaaaacccccaaaaaaaaaaaaaaaaaaaaaaacaaaaaaaaaacccaaaaacccccccccccaffffaaaaccccccccccccccaaa +abccccccccccccaaacaaaaaacccccccccccaaaaaaaacaaaaaaaaaaaaaaaaaaaaaaaaacaaaaaaacccaaacaaaccaaaaaacccccccccccccccccaaaccccccccccccccaaa +abccccccccccccaaccaaaaaccccccccccccccaaaaaaaccccaaaaaaaaaaaaccccaacccccaaaaaacccaaaccccccaaccaacccccccccccccccccaaacccccccccccaaaaaa +abcccccccccccccccaaaaaaaaccccccccccccaacccacccccccaaaaaaaaaaccccaacccccaaccccccccaccccccccccccccccccccccccccccccccccccccccccccaaaaaa diff --git a/2022/day12/main.go b/2022/day12/main.go new file mode 100644 index 0000000..492dc13 --- /dev/null +++ b/2022/day12/main.go @@ -0,0 +1,87 @@ +package main + +import ( + "fmt" + "math" + + h "git.bullercodeworks.com/brian/adventofcode/helpers" +) + +func main() { + inp := h.StdinToStringSlice() + part1(inp) + fmt.Println() + part2(inp) +} + +func part1(inp []string) { + m := h.StringSliceToCoordByteMap(inp) + start, _ := m.FindFirst('S') + m.Put(start, 'a') + end, _ := m.FindFirst('E') + m.Put(end, 'z') + + fmt.Println("# Part 1") + fmt.Println("Steps:", bfs(m, start, end)) +} + +func part2(inp []string) { + m := h.StringSliceToCoordByteMap(inp) + starts := m.FindAll('a') + if s, err := m.FindFirst('S'); err == nil { + m.Put(s, 'a') + starts = append(starts, s) + } + end, _ := m.FindFirst('E') + m.Put(end, 'z') + + minSteps := math.MaxInt + for _, start := range starts { + curSteps := bfs(m, start, end) + if minSteps > curSteps { + minSteps = curSteps + } + } + fmt.Println("# Part 2") + fmt.Println("Steps:", minSteps) +} + +func bfs(m h.CoordByteMap, start, end h.Coordinate) int { + seen := make(map[h.Coordinate]bool) + seen[start] = true + queue := []h.Coordinate{start} + steps := 0 + found := false + // BFS Search +SEARCH: + for len(queue) > 0 { + k := len(queue) + for i := 0; i < k; i++ { + curr := queue[0] + currVal := m.Get(curr) + queue = queue[1:] + if end.Equals(curr) { + found = true + break SEARCH + } + for _, dir := range curr.GetOrthNeighbors() { + if !m.ContainsCoord(dir) || seen[dir] { + continue + } + newVal := m.Get(dir) + greater := m.Get(dir) > currVal + if greater && newVal-currVal > 1 { + continue + } + seen[dir] = true + queue = append(queue, dir) + } + } + steps++ + } + if !found { + //fmt.Println("Path from", start, "to", end, "not found!") + return math.MaxInt + } + return steps +} diff --git a/2022/day12/problem b/2022/day12/problem new file mode 100644 index 0000000..b1228b5 --- /dev/null +++ b/2022/day12/problem @@ -0,0 +1,109 @@ +Advent of Code +br0xen (AoC++) 26* + +--- Day 12: Hill Climbing Algorithm --- + + You try contacting the Elves using your handheld device, but the river you're following must be + too low to get a decent signal. + + You ask the device for a heightmap of the surrounding area (your puzzle input). The heightmap + shows the local area from above broken into a grid; the elevation of each square of the grid is + given by a single lowercase letter, where a is the lowest elevation, b is the next-lowest, and + so on up to the highest elevation, z. + + Also included on the heightmap are marks for your current position (S) and the location that + should get the best signal (E). Your current position (S) has elevation a, and the location that + should get the best signal (E) has elevation z. + + You'd like to reach E, but to save energy, you should do it in as few steps as possible. During + each step, you can move exactly one square up, down, left, or right. To avoid needing to get out + your climbing gear, the elevation of the destination square can be at most one higher than the + elevation of your current square; that is, if your current elevation is m, you could step to + elevation n, but not to elevation o. (This also means that the elevation of the destination + square can be much lower than the elevation of your current square.) + + For example: + + Sabqponm + abcryxxl + accszExk + acctuvwj + abdefghi + + Here, you start in the top-left corner; your goal is near the middle. You could start by moving + down or right, but eventually you'll need to head toward the e at the bottom. From there, you + can spiral around to the goal: + + v..v<<<< + >v.vv<<^ + .>vv>E^^ + ..v>>>^^ + ..>>>>>^ + + In the above diagram, the symbols indicate whether the path exits each square moving up (^), + down (v), left (<), or right (>). The location that should get the best signal is still E, and . + marks unvisited squares. + + This path reaches the goal in 31 steps, the fewest possible. + + What is the fewest steps required to move from your current position to the location that should + get the best signal? + + Your puzzle answer was 449. + +--- Part Two --- + + As you walk up the hill, you suspect that the Elves will want to turn this into a hiking trail. + The beginning isn't very scenic, though; perhaps you can find a better starting point. + + To maximize exercise while hiking, the trail should start as low as possible: elevation a. The + goal is still the square marked E. However, the trail should still be direct, taking the fewest + steps to reach its goal. So, you'll need to find the shortest path from any square at elevation + a to the square marked E. + + Again consider the example from above: + + Sabqponm + abcryxxl + accszExk + acctuvwj + abdefghi + + Now, there are six choices for starting position (five marked a, plus the square marked S that + counts as being at elevation a). If you start at the bottom-left square, you can reach the goal + most quickly: + + ...v<<<< + ...vv<<^ + ...v>E^^ + .>v>>>^^ + >^>>>>>^ + + This path reaches the goal in only 29 steps, the fewest possible. + + What is the fewest steps required to move starting from any square with elevation a to the + location that should get the best signal? + + Your puzzle answer was 443. + + Both parts of this puzzle are complete! They provide two gold stars: ** + +References + + Visible links + . https://adventofcode.com/ + . https://adventofcode.com/2022/about + . https://adventofcode.com/2022/events + . https://adventofcode.com/2022/settings + . https://adventofcode.com/2022/auth/logout + . Advent of Code Supporter + https://adventofcode.com/2022/support + . https://adventofcode.com/2022 + . https://adventofcode.com/2022 + . https://adventofcode.com/2022/support + . https://adventofcode.com/2022/sponsors + . https://adventofcode.com/2022/leaderboard + . https://adventofcode.com/2022/stats + . https://adventofcode.com/2022/sponsors + . https://adventofcode.com/2022 + . https://adventofcode.com/2022/day/12/input diff --git a/2022/day12/testinput b/2022/day12/testinput new file mode 100644 index 0000000..86e9cac --- /dev/null +++ b/2022/day12/testinput @@ -0,0 +1,5 @@ +Sabqponm +abcryxxl +accszExk +acctuvwj +abdefghi diff --git a/2022/day13/input b/2022/day13/input new file mode 100644 index 0000000..6d78e26 --- /dev/null +++ b/2022/day13/input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+[[3,[[6,1,0,2],[9],2,3],[5,[6,3,0,10],1]],[]] +[[10,9,[],[]],[[6]],[0],[10,[10,6,5,[1]],[[3,10,0,8,1]]]] + +[[7,[[4],2,5],2],[[1,3,[7,4,4,9,5]]],[3,2,[[],1,2,[4],[6,4]],[]]] +[[],[[[]],3,[7,2,[]]]] + +[[1,[[6,9]],5,[[9,5,5,5],9,8,8],[3,2,5,[4,0,4],3]],[4,7],[[[4,2,7,3],[5,1],[10,4]],[[2,9,2],[7,8,1],[10,4,2,3,6],[],5],[10,9,[]]],[9]] +[[[5,10,[6,5,9,3,3],8]],[],[[7,[4],1,0,[9,4,8]],[[10,1],2,3,6],8,3]] + +[[8,4,3,8,[1,0]],[5,[7,[],7]],[10,[[6,2,4],[7,3,7,5],[],[],1],6,2],[[],[[0,9,6],[],8]],[9,[],10]] +[[[[10,8,5,0]],[]],[7],[[1,[2],[8,0,0]],[[2],[],[2,1,1,0,8]],3,[[10,4]],7],[10,[1,[4,5,7],10,5,[8,5,2,10]],1,9]] + +[[1],[0,1,[2,7],[[10],1,[]],[[3,3,4,2,5],4,[],[6,3,1,10],3]],[[3,[9,9,9,1],[8,9,0],0],3,3],[10],[[9,[9,1,6,7],7]]] +[[1,4,[],5],[4,[2,8,6,[3,5,6,4]],3,4,[[],2,[]]],[[[7,1,0,1],[6,10,9,8,3]],[[10,10],6,[]],0],[]] + +[[2,10]] +[[[0],0,[[1,0],[5,5,9]]]] + +[[5,[[3],10,[9,9],[6,4],[]],[5,3,9,[5,0,10,4],9]],[[[0,1,1,8,5]]],[[],[[2,9,7,2],3,1,[6,3]],8,[]],[],[9,9,[[4,0,4],[],3,1]]] +[[],[8,9],[[],9,3,5],[[9,1,[1,4]],[[2],[6,8],[4]],[[],4,[]],8,4]] + +[[0],[4]] +[[[4,7,1,6]],[[10,3,3,3]]] + +[[[[2,9,9,7],1],[1,3,[1,9,8,9,8],10],3,3,5]] +[[[1,6,[3,7,3,0,4],10,[5,2,7]],[[6,5,10,8,6],[8,3,10,5,10],[9,3,5],2,4],10,[7,6]],[1],[[[4,9,3],6,2,[5,4,4,1],2],[[0,3]],9]] + +[[8,[],2]] +[[3,[5,2,[5,1],[8,4,4],10],6,[[1,4],[]],8],[6,10],[[1,4,[5],2,0],4,[[],3],[5,6],2]] + +[[1,9],[]] +[[2,[0,3,8,2]]] + +[[[6,5,7],[2,6]],[10,7,[6,9,6,[3,8,2],[]],1,10],[[[5,2,6,5],4,[]],[6,0,6],1,[]],[5],[[6,3,[7,7,3,2,0]],[[],[7,1,3,5]],[]]] +[[4,[[3,6,9,8,4],0,8,[10,0]],6,0],[3,1,[[7]],[6,8,8,1,4],2],[8,[6,[1],4,0,[8,3,8]],[3]],[[[7,5,3,10]],6,2],[2,[0,[]],5,[4,7]]] + +[[5,0,1,[9,[],[1,10,6,6],[]]],[],[[1],8],[[2,[1,9,1,3]]],[[[],[],7,9,[]]]] +[[],[],[4,2,[[],[3],[3,2,8],0],[[10],[0,7,5,0],[10,8],0,[]],[[],6,2]],[[[5,8,1],[2]],[8],6,[1]]] + +[6,0,1,5,5] +[6,0,1,5] + +[[[4],[],4],[2,[[],[0,5],7,[4,4]],[[9,6],5]],[],[[],2,[],7]] +[[[7,[9,8,8,3]],[],[],6],[9,[[2,0],[7,0],2],5,[[]],[[3,3,6],6,[1,6,1],[10,4]]],[8,[9],4],[[[],[10,0,5],8]]] + +[[[[9,10,2],3,5,[9,8,8,9],4]],[6,[]],[[],[4,10,2,6,[2]],6],[4,6,5,[[],[],3,9,[4,0,2]],5]] +[[5,[[],[1,4,2,4],1]],[2],[7,[8,4,4]]] + +[1,9,4,8] +[1,9,4,8,5] + +[[[[],8,[7,9],4],10,[4,[10,8,4,0]],[3,[10,7],1,[]],[[8,6,8,7,8],2,9]],[]] +[[6,0],[10,10,6,[2,[],[8,1,6,4]]]] + +[[8,6],[[[]]]] +[[5,6]] + +[[],[],[[7],[8],[0,8,0,5],9,2],[1,3,3,[7,8],[4,0,[6,3,9,1],[3,8,4,2,5],[9,5]]],[10,[[0,9,0],[7,9]],9,3]] +[[],[[7,7,[2]],[[6,5,10,7],[8,4,9,0,4],6],[2,9,[4,8],10,5],[2,[7,10,0,1],[3,7]]],[[[5,4,0],[6,5],7,0,[2,6,5]],4,1,[4,10,1,2]],[[3]]] + +[[9,[],3],[10,[4,9,10,0]],[[],5,[[8,0,7,9],6,3],[[10,4],[8,6,0,7],3,2]],[2],[[5]]] +[[[[4],9,[0,7,4,10]],8,[5,8,6,0]],[6],[5,[[],[7,0,5,5],0,[]]],[1,[1,[7,1,10,0,8],2],[2,[9,2,2,8],1,10,[6,9,3]]]] + +[[[],4,[10],[5,[1,0,9],2]],[[6,[4],2,4,10],6,[5],[2,7,[7,6,3,4]]],[[7,1,[5]],10,[1,[0],[],[8,9,9,7],7]],[6,[8],1,3,10],[10,[9]]] +[[1,1,0,0],[1,[[3,10,6,9,10]],[[3,0,6,4,9],0,2]]] + +[[10,[7],5,[],6],[[7,[3,10,9,1],[8],[],[1,0]],[5,8]],[7,[[4,4,0]],10,[3,[9,3,5,2,0],9]]] +[[5,[[4,8]],9,[0,[7,7,8,0,3],4,10],[10,[5,1,7,7,10]]],[],[6,5],[[],7,1,[[],[0,8,1],10],[]],[[],[],[3,10,[2,9,10,4,10],4],10,[10,[10,10,6,8,5],[5],6]]] + +[[[],2,[10,[6,3,10,7],[]],[]],[],[[4,7,[],7,[]],[[1],10,[8,0],10,2],[[8,0,3,3,4],[7,2,3],[3,8,6,9],9],[],[6,8,0,[7]]],[10],[[[8,0,4,6],3,[]],0,6,[[6],5,7,9],[[4,0,7,5]]]] +[[1,[[0],[],[],5],8,6],[0,[2,6,2,[9],6],2],[[[0,4,5,5,4]],[4,5,1,6],3]] + +[[[[5,4,0,9,10],[0,0,7,8,5],[4,6,7],8,5],[[5,2,0,7,3],5,[],[0,0]],[1,3,1,[2],[]],8]] +[[[1,[9,4,4],[8,1,5]],[[5,2],4,10,3,10]],[[[9,6,8]]],[[4,[6,0,2,9,8],[],[10,10,9,2,2],0]],[10,0,[]]] + +[[],[[7,[10,9,10],4],[2,2,[1,0]]],[[2,[3,8,5,9,3]],[[3,2,9],[],5,8],[],[[10,2],0,[]],[[10,6,0],5]],[3,[],[],[2,5,[4,8,1,7],4],[]],[8,1,[[3,4,6,7,1],7]]] +[[1],[[[4,7,9,10],3,[5,9,7,9,10]]]] + +[[1,10,[7,[],[7,6,3],10,9],[[0,10,0]],[4,6,[3]]],[[[6,2,6,3],10,[3,0,7,4]],5,10,6,[[5],6,[],9,[8,2,10,0]]],[],[[[0,8],10],8,[[1,8,1,3,6],2,[6],[7,0]],1]] +[[[3],3,[8,7,[10,8,4,3,6],2],[6,2],5]] + +[[[[1,0,4,3],[9],[1],2]],[[8,9,0],[],10,8,[[5,5,6,5],6]],[[[9],0,10],1,[2,8]],[9]] +[[[2],7,0,1,5],[[[1,6,4,3,4],6,1],[],5,[],[[7,4],[4,1,8,7,0],[],6]],[0,[0,[9],[9]],[10,1,7,[]],2,[[6,5,9,1],[3],5,[5],4]],[8,10,[[10,5,4],0],[5,[10],10,[1]]],[]] + +[[],[2],[1],[9,[[1,2,7]]],[[[1,1],[2],10,[7,1,0]],6]] +[[4,[[9,8]],[[9,3],1,[6]]],[[[4,2,5],[],[],2,6],3],[[[1,0,5,6],[2,6,10,5,9],[1,4,3,0,2],[10,2,9]],[5,2,7,[10,10,9,4,3]],[[3,5,8,9],[10,1,3,10],[],[2,8,1,8]],3,[]],[0,[],[[2,4],[8],[],[5,7,1,1]]],[[[],9,1,7],7]] + +[[4,0,[1,10,[],0,[]],8,0],[],[],[4]] +[[4,[9],2],[9],[3]] + +[[[[6,0,4,2,0],9,[7,8],8]],[],[[2,7],1,4]] +[[],[[]],[],[[[9,7],4,[0],[3,10,10,8,4]],6,5]] + +[[[7]],[],[],[[],[7]],[7,[3,6,3],1]] +[[[8],[7],[3],[[3,2,4,9]],4],[[5,0,[3],[6]]],[[[9,9],[10,1,0,6,3],2]],[0,[2,8,[4,4],2],2]] + +[[],[[[4,3,0,2],[2,4,10,5,3],[]],[[5,9],7,[4,6]],[[6,6],[6,9,2,4],[9,8,9],8]],[[],2,8,8]] +[[[5,9,10],[4,[10]],[[],[9],[]],[4,2,6],2],[[4,[7,3,1,9,3],[3,1,6,5],8]]] + +[[[[4,0],10,3],[[6],[],10],10,6],[8,7]] +[[],[],[10,2,0],[[[3,8,7],[2,0]]],[3,5,5,1]] + +[[[[8,7],4,6,[10,7,9],[1,2]],3,[[5,5,5],4,[0],0]],[6,[[2,0,2,10,2],9],[8,0,[5,5,1,7,6],[2,5,2],[]]],[[[4,5,5],2,5,[4,8]]],[10,4],[[3,[],1,3],[],[3,[9,7,0,1]]]] +[[[[9,9],9,6,8],3,[[],[],[10,8,6,7,6]],2],[[[0,5],4,7,[8,7,10],2],[[9,1],9,[4,9],6],2,5,[4,[7,6,6,4],3,8]],[[],[3,[7,7],1],10]] + +[[9,[0,3,[0,6,9]],[[7,1],[4,4,3,1,9],10],1,3]] +[[8,7,8],[8,4,[]],[[[1],[4,9],[3]],6,8,[4,[6,3],[7],[1,0,10,7],10]],[2,2,0]] + +[[2,10,2],[],[[[2,6,8,7],2],[7,[]]],[7,[[4]],9],[1,[3,[10,2]]]] +[[[],[]],[[3,5],[],10],[]] + +[[2,6,6]] +[[8],[[4],[0,3,[]],[[8,6,0]],[10,10,8,1]],[[0,7],2,[0,10,[7,7,0,7,5],2],7],[[[2,5,7],6,4,10,2],7],[9]] + +[[[9,[7,3],[9,7],1]],[[7,[6,4],1],[0],7,[]],[5,7,[[9,10,10],[10,2]]]] +[[8,[]],[[],[7,10,5,3,[5,8]],[],[[],4,2,8,[2,7,5,7,0]],[1,[9]]],[4,1,2,4,5]] + +[[3,4,[]],[],[3,8,5,[4]]] +[[[5]],[],[],[[[3]],[[3,3,2,9,10],[0,6,5,7],9,2]]] + +[[],[6,[10]],[[5,8,[5,7,4]],5,5],[1,[4,4,[],3,[4,1]],[[5,1,2,7],[10,6],2],[[7],0,0,[7],[1,4]],[8]]] +[[[[6,10,2],[],6,[5,1,1,1,1]],[8,2,[6,7],10,5],3],[6,[5,[9,4,3]]],[[[2,6,10],[0],9,9,[3]],9,5],[9,[9],[[4,4,10],10,6,[],[0,7]],[4,[8,1,9,5],[4]],[[0,3,7,7],[0,9,10,10]]]] + +[[[],5,[3,[],9,[8,10]],2,6],[1,[6,[],6,[10,7,7,6],[3,7]],5],[7,10,[[8],[9,6],[],3,5],[[],4,2,8]],[[8,[]]],[8]] +[[9,4],[10,5],[[6,10,[0,1,1],0],7,4],[2,3,[7,8,1,1],6]] + +[[],[[1,[2,1],5,[],9],6,[9,4,8],[[5,1,7],[10,1,8],0]],[8,1,[[],2,[2,8]]],[[3,[2,3,0],8,6,[]],[8,4,[8],[10,7,2,2,0]],9,1,[1,[0,8,7,1],2]],[[9,5],[[1,2],[],10,7],2]] +[[[10],6,7,4],[],[7,[0,9],[1,10,[0,10]],[[3,10],5,[9,9,8]]]] + +[[[5,[0,8,0]],[[6,3,2,3,5],[8,4]],1],[[[6,6,6,2],1,[2,2],2],9,6,2],[]] +[[[],[],[[4,5],0],[10,6,7]],[[8,[9,8]]],[[[],[],3,7],[],0]] + +[[],[7,4],[[5],5],[[],1,10,[0,[5,0,1,10,6],[8],1,[4]],0],[0]] +[[],[1,0,10],[]] + +[[3,2,[[7,9,4,8,2],2,[1,0,9,6],10,[3,0]]],[[9,6],[[]],1,[[],5,[5,4]],[2]],[],[8,[[6],2]],[[]]] +[[0,[1],[],[[2]]],[[5,[1,0]],[[],2]],[4,[10,2,5],[[6,7,2,10,1],1,0,1]],[]] + +[[0,[],[[5,3,5,3,0],[],[3,8,0,0,1],[2]]],[]] +[[[7,2],6,[8],[],[]]] + +[[[10],0,0,[[0,9]]],[[0,4],[[2,9,1,3]],9],[2,[[]],[7,[0,8],8]],[6,[[6,9],10,[],[4,2],[0]]]] +[[8,[0,9]],[[2,6,8,[5],[8,1,1,9,4]],1,4],[[1,5],2]] + +[[[10,[],9,7,6]],[1],[],[[8],10,[9],[]]] +[[[[9,7,7,7,0],[0,3,9,9,2],5],8,0,0],[],[[3,2,2,[2]],[2,[]],7],[[9,[7,8,9,9,10],[8,10]],6,10,[[]]],[]] diff --git a/2022/day13/main.go b/2022/day13/main.go new file mode 100644 index 0000000..7f3ef01 --- /dev/null +++ b/2022/day13/main.go @@ -0,0 +1,277 @@ +package main + +import ( + "fmt" + "math" + "sort" + "strings" + + h "git.bullercodeworks.com/brian/adventofcode/helpers" +) + +func main() { + inp := h.StdinToStringSlice() + part1(inp) + fmt.Println() + part2(inp) +} + +func part1(inp []string) { + commCount := 1 + var result int + for i := 0; i < len(inp); i++ { + if inp[i] == "" { + commCount++ + continue + } + pck1 := NewPacket(inp[i]) + i++ + pck2 := NewPacket(inp[i]) + if !pck1.GreaterThan(pck2) { + result += commCount + } + } + fmt.Println("# Part 1") + fmt.Println("Sum:", result) +} + +func part2(inp []string) { + var packets []*Packet + for i := 0; i < len(inp); i++ { + if inp[i] == "" { + continue + } + packets = append(packets, NewPacket(inp[i])) + } + div1, div2 := "[[2]]", "[[6]]" + var div1Idx, div2Idx int + packets = append(packets, NewPacket(div1)) + packets = append(packets, NewPacket(div2)) + sort.Slice(packets, func(i, j int) bool { + return packets[j].GreaterThan(packets[i]) + }) + for i := range packets { + if packets[i].raw == div1 { + div1Idx = i + 1 + } else if packets[i].raw == div2 { + div2Idx = i + 1 + } + } + + fmt.Println("# Part 2") + fmt.Println("Decoder Key:", (div1Idx * div2Idx)) +} + +var outIndent int +var debug bool + +func out(o string) { + if debug { + fmt.Printf("%s%s\n", strings.Repeat(" ", outIndent), o) + } +} + +type Value struct { + raw string + Val int + List *ValueList +} + +func NewValue() *Value { + return &Value{ + Val: math.MinInt, + } +} +func (v *Value) Equals(v2 *Value) bool { + if v.IsInt() && v2.IsInt() { + return v.Val == v2.Val + } else if !v.IsInt() && !v2.IsInt() { + return v.List.Equals(v2.List) + } else { + // One is a list and the other is not + if v.IsInt() { + wrkV := NewValue() + wrkV.List = NewValueListFrom(v) + return wrkV.Equals(v2) + } else { + wrkV := NewValue() + wrkV.List = NewValueListFrom(v2) + return v.Equals(wrkV) + } + } +} +func (v *Value) GreaterThan(v2 *Value) bool { + outIndent++ + if v.IsInt() && v2.IsInt() { + // Both are ints, which is greater? + out(fmt.Sprintf("Comparing: %v >? %v", v.Val, v2.Val)) + outIndent-- + return v.Val > v2.Val + } else if !v.IsInt() && !v2.IsInt() { + // Both are lists, check values in order + out(fmt.Sprintf("Comparing Lists: %v >? %v", v.List, v2.List)) + tst := v.List.GreaterThan(v2.List) + outIndent-- + return tst + } else { + // One is a list and the other is not + out(fmt.Sprintf("Comparing Different Types: %v >? %v", v, v2)) + if v.IsInt() { + wrkV := NewValue() + wrkV.List = NewValueListFrom(v) + tst := wrkV.GreaterThan(v2) + outIndent-- + return tst + } else { + wrkV := NewValue() + wrkV.List = NewValueListFrom(v2) + tst := v.GreaterThan(wrkV) + outIndent-- + return tst + } + } +} +func (v *Value) IsInt() bool { return v.Val != math.MinInt } +func (v Value) String() string { + if v.Val != math.MinInt { + return fmt.Sprintf("{%d}", v.Val) + } else { + ret := "{[" + for i := range *v.List { + ret = fmt.Sprintf("%s%s,", ret, (*v.List)[i].String()) + } + ret = strings.TrimSuffix(ret, ",") + return fmt.Sprintf("%s]}", ret) + } +} + +type ValueList []*Value + +func NewValueListFrom(vals ...*Value) *ValueList { + ret := ValueList{} + for i := range vals { + ret.Add(vals[i]) + } + return &ret +} +func (vl *ValueList) Add(v *Value) { + *vl = append(*vl, v) +} +func (vl *ValueList) Equals(vl2 *ValueList) bool { + wrk1, wrk2 := []*Value(*vl), []*Value(*vl2) + if len(wrk1) != len(wrk2) { + return false + } + for i := range wrk1 { + v1, v2 := wrk1[i], wrk2[i] + if !v1.Equals(v2) { + return false + } + } + return true +} +func (vl *ValueList) GreaterThan(vl2 *ValueList) bool { + wrk1, wrk2 := []*Value(*vl), []*Value(*vl2) + out(fmt.Sprintf("Comparing Lists: %v >? %v", wrk1, wrk2)) + for i := range wrk1 { + var v1, v2 *Value + v1 = wrk1[i] + if len(wrk2) > i { + v2 = wrk2[i] + } else { + // vl is greater (has more items) + return true + } + if v1.GreaterThan(v2) { + out("v1 is greater than v2") + return true + } else if v2.GreaterThan(v1) { + return false + } + } + if len(wrk2) < len(wrk1) { + return true + } + return false +} + +type Packet struct { + raw string + Val *Value +} + +func (p *Packet) GreaterThan(p2 *Packet) bool { + return p.Val.GreaterThan(p2.Val) +} +func (p Packet) String() string { + return fmt.Sprintf("[%v]", p.Val) +} +func NewPacket(inp string) *Packet { + p := Packet{ + raw: inp, + Val: NewValue(), + } + p.Val.List = ParsePacketList(inp) + return &p +} + +func ParsePacketList(inp string) *ValueList { + if inp[0] != '[' { + return &ValueList{} + } + // parse all string tokens (at depth 1) through to the closing ']' + var tokens []string + tokenStart := 1 + var depth int + for i := 0; i < len(inp); i++ { + if inp[i] == ',' && depth == 1 { + // Token break + tokens = append(tokens, inp[tokenStart:i]) + tokenStart = i + 1 + } + if inp[i] == '[' { + depth++ + } + if inp[i] == ']' { + depth-- + } + if depth == 0 { + if len(inp[tokenStart:i]) > 0 { + tokens = append(tokens, inp[tokenStart:i]) + tokenStart = i + 1 + } + break + } + } + // Now parse all tokens and add to the list + ret := NewValueListFrom() + for i := range tokens { + ret.Add(ParsePacketValue(tokens[i])) + } + return ret +} + +// Parse a value out of the given string +func ParsePacketValue(inp string) *Value { + var rem string + v := NewValue() + if inp[0] == '[' { + // It's a list + list := ParsePacketList(inp) + v.raw = strings.TrimSuffix(inp, rem) + v.List = list + } else { + // It's an integer + sep := strings.IndexAny(inp, ",]") + var wrk string + if sep >= 0 { + wrk = inp[:sep] + rem = inp[sep+1:] + } else { + wrk = inp + rem = "" + } + v.Val = h.Atoi(wrk) + } + return v +} diff --git a/2022/day13/problem b/2022/day13/problem new file mode 100644 index 0000000..29e3795 --- /dev/null +++ b/2022/day13/problem @@ -0,0 +1,203 @@ +Advent of Code +br0xen (AoC++) 26* + +--- Day 13: Distress Signal --- + + You climb the hill and again try contacting the Elves. However, you instead receive a signal you + weren't expecting: a distress signal. + + Your handheld device must still not be working properly; the packets from the distress signal + got decoded out of order. You'll need to re-order the list of received packets (your puzzle + input) to decode the message. + + Your list consists of pairs of packets; pairs are separated by a blank line. You need to + identify how many pairs of packets are in the right order. + + For example: + + [1,1,3,1,1] + [1,1,5,1,1] + + [[1],[2,3,4]] + [[1],4] + + [9] + [[8,7,6]] + + [[4,4],4,4] + [[4,4],4,4,4] + + [7,7,7,7] + [7,7,7] + + [] + [3] + + [[[]]] + [[]] + + [1,[2,[3,[4,[5,6,7]]]],8,9] + [1,[2,[3,[4,[5,6,0]]]],8,9] + + Packet data consists of lists and integers. Each list starts with [, ends with ], and contains + zero or more comma-separated values (either integers or other lists). Each packet is always a + list and appears on its own line. + + When comparing two values, the first value is called left and the second value is called right. + Then: + + • If both values are integers, the lower integer should come first. If the left integer is + lower than the right integer, the inputs are in the right order. If the left integer is + higher than the right integer, the inputs are not in the right order. Otherwise, the inputs + are the same integer; continue checking the next part of the input. + • If both values are lists, compare the first value of each list, then the second value, and + so on. If the left list runs out of items first, the inputs are in the right order. If the + right list runs out of items first, the inputs are not in the right order. If the lists are + the same length and no comparison makes a decision about the order, continue checking the + next part of the input. + • If exactly one value is an integer, convert the integer to a list which contains that + integer as its only value, then retry the comparison. For example, if comparing [0,0,0] and + 2, convert the right value to [2] (a list containing 2); the result is then found by instead + comparing [0,0,0] and [2]. + + Using these rules, you can determine which of the pairs in the example are in the right order: + + == Pair 1 == + - Compare [1,1,3,1,1] vs [1,1,5,1,1] + - Compare 1 vs 1 + - Compare 1 vs 1 + - Compare 3 vs 5 + - Left side is smaller, so inputs are in the right order + + == Pair 2 == + - Compare [[1],[2,3,4]] vs [[1],4] + - Compare [1] vs [1] + - Compare 1 vs 1 + - Compare [2,3,4] vs 4 + - Mixed types; convert right to [4] and retry comparison + - Compare [2,3,4] vs [4] + - Compare 2 vs 4 + - Left side is smaller, so inputs are in the right order + + == Pair 3 == + - Compare [9] vs [[8,7,6]] + - Compare 9 vs [8,7,6] + - Mixed types; convert left to [9] and retry comparison + - Compare [9] vs [8,7,6] + - Compare 9 vs 8 + - Right side is smaller, so inputs are not in the right order + + == Pair 4 == + - Compare [[4,4],4,4] vs [[4,4],4,4,4] + - Compare [4,4] vs [4,4] + - Compare 4 vs 4 + - Compare 4 vs 4 + - Compare 4 vs 4 + - Compare 4 vs 4 + - Left side ran out of items, so inputs are in the right order + + == Pair 5 == + - Compare [7,7,7,7] vs [7,7,7] + - Compare 7 vs 7 + - Compare 7 vs 7 + - Compare 7 vs 7 + - Right side ran out of items, so inputs are not in the right order + + == Pair 6 == + - Compare [] vs [3] + - Left side ran out of items, so inputs are in the right order + + == Pair 7 == + - Compare [[[]]] vs [[]] + - Compare [[]] vs [] + - Right side ran out of items, so inputs are not in the right order + + == Pair 8 == + - Compare [1,[2,[3,[4,[5,6,7]]]],8,9] vs [1,[2,[3,[4,[5,6,0]]]],8,9] + - Compare 1 vs 1 + - Compare [2,[3,[4,[5,6,7]]]] vs [2,[3,[4,[5,6,0]]]] + - Compare 2 vs 2 + - Compare [3,[4,[5,6,7]]] vs [3,[4,[5,6,0]]] + - Compare 3 vs 3 + - Compare [4,[5,6,7]] vs [4,[5,6,0]] + - Compare 4 vs 4 + - Compare [5,6,7] vs [5,6,0] + - Compare 5 vs 5 + - Compare 6 vs 6 + - Compare 7 vs 0 + - Right side is smaller, so inputs are not in the right order + + What are the indices of the pairs that are already in the right order? (The first pair has index + 1, the second pair has index 2, and so on.) In the above example, the pairs in the right order + are 1, 2, 4, and 6; the sum of these indices is 13. + + Determine which pairs of packets are already in the right order. What is the sum of the indices + of those pairs? + + Your puzzle answer was 5905. + +--- Part Two --- + + Now, you just need to put all of the packets in the right order. Disregard the blank lines in + your list of received packets. + + The distress signal protocol also requires that you include two additional divider packets: + + [[2]] + [[6]] + + Using the same rules as before, organize all packets - the ones in your list of received packets + as well as the two divider packets - into the correct order. + + For the example above, the result of putting the packets in the correct order is: + + [] + [[]] + [[[]]] + [1,1,3,1,1] + [1,1,5,1,1] + [[1],[2,3,4]] + [1,[2,[3,[4,[5,6,0]]]],8,9] + [1,[2,[3,[4,[5,6,7]]]],8,9] + [[1],4] + [[2]] + [3] + [[4,4],4,4] + [[4,4],4,4,4] + [[6]] + [7,7,7] + [7,7,7,7] + [[8,7,6]] + [9] + + Afterward, locate the divider packets. To find the decoder key for this distress signal, you + need to determine the indices of the two divider packets and multiply them together. (The first + packet is at index 1, the second packet is at index 2, and so on.) In this example, the divider + packets are 10th and 14th, and so the decoder key is 140. + + Organize all of the packets into the correct order. What is the decoder key for the distress + signal? + + Your puzzle answer was 21691. + + Both parts of this puzzle are complete! They provide two gold stars: ** + +References + + Visible links + . https://adventofcode.com/ + . https://adventofcode.com/2022/about + . https://adventofcode.com/2022/events + . https://adventofcode.com/2022/settings + . https://adventofcode.com/2022/auth/logout + . Advent of Code Supporter + https://adventofcode.com/2022/support + . https://adventofcode.com/2022 + . https://adventofcode.com/2022 + . https://adventofcode.com/2022/support + . https://adventofcode.com/2022/sponsors + . https://adventofcode.com/2022/leaderboard + . https://adventofcode.com/2022/stats + . https://adventofcode.com/2022/sponsors + . https://adventofcode.com/2022 + . https://adventofcode.com/2022/day/13/input diff --git a/2022/day13/testinput b/2022/day13/testinput new file mode 100644 index 0000000..af73fbb --- /dev/null +++ b/2022/day13/testinput @@ -0,0 +1,23 @@ +[1,1,3,1,1] +[1,1,5,1,1] + +[[1],[2,3,4]] +[[1],4] + +[9] +[[8,7,6]] + +[[4,4],4,4] +[[4,4],4,4,4] + +[7,7,7,7] +[7,7,7] + +[] +[3] + +[[[]]] +[[]] + +[1,[2,[3,[4,[5,6,7]]]],8,9] +[1,[2,[3,[4,[5,6,0]]]],8,9] diff --git a/helpers/coordinate.go b/helpers/coordinate.go index e9a5b6d..766e10d 100644 --- a/helpers/coordinate.go +++ b/helpers/coordinate.go @@ -42,6 +42,9 @@ func (c *Coordinate) SW() Coordinate { func (c *Coordinate) SE() Coordinate { return Coordinate{X: c.X + 1, Y: c.Y + 1} } +func (c *Coordinate) GetOrthNeighbors() []Coordinate { + return []Coordinate{c.North(), c.East(), c.South(), c.West()} +} func (c *Coordinate) GetNorthCoord() *Coordinate { return &Coordinate{ diff --git a/helpers/coordinateByteMap.go b/helpers/coordinateByteMap.go index 4d620ea..3806d50 100644 --- a/helpers/coordinateByteMap.go +++ b/helpers/coordinateByteMap.go @@ -35,6 +35,24 @@ func StringSliceToCoordByteMap(input []string) CoordByteMap { return ret } +func (m *CoordByteMap) ToByteSlices() [][]byte { + var ret [][]byte + for y := m.TLY; y <= m.BRY; y++ { + var line []byte + for x := m.TLX; x <= m.BRX; x++ { + line = append(line, m.Get(Coordinate{X: x, Y: y})) + } + ret = append(ret, line) + } + return ret +} + +// ContainsCoord returns true if the passed coordinate is in the map +func (m *CoordByteMap) ContainsCoord(c Coordinate) bool { + return c.X >= m.TLX && c.X <= m.BRX && + c.Y >= m.TLY && c.Y <= m.BRY +} + // FindFirst searches left to right, top to bottom for the first // instance of b. func (m *CoordByteMap) FindFirst(b byte) (Coordinate, error) { @@ -85,6 +103,52 @@ func (m *CoordByteMap) FindAllNot(b ...byte) map[Coordinate]byte { return ret } +// FindAdjacentOrth takes a coordinate and a desired byte, and returns +// all adjacent coordinates that contain that byte +func (m *CoordByteMap) FindAdjacent(st Coordinate, val byte) []Coordinate { + return m.AnyContain([]Coordinate{st.North(), st.NE(), st.East(), st.SE(), st.South(), st.SW(), st.West(), st.NW()}, val) +} + +// FindAdjacentOrth takes a coordinate and a desired byte, and returns +// all adjacent coordinates that contain that byte, Orthogonally +func (m *CoordByteMap) FindAdjacentOrth(st Coordinate, val byte) []Coordinate { + return m.AnyContain([]Coordinate{st.North(), st.East(), st.South(), st.West()}, val) +} + +func (m *CoordByteMap) AnyContain(check []Coordinate, val byte) []Coordinate { + var ret []Coordinate + for _, wrk := range check { + if m.Get(wrk) == val { + ret = append(ret, wrk) + } + } + return ret +} + +// FindAnyAdjacentOrth takes a coordinate and a list of desired bytes, and returns +// all adjacent coordinates that contain those bytes +func (m *CoordByteMap) FindAnyAdjacent(st Coordinate, val []byte) []Coordinate { + return m.AnyContainAny([]Coordinate{st.North(), st.NE(), st.East(), st.SE(), st.South(), st.SW(), st.West(), st.NW()}, val) +} + +// FindAnyAdjacentOrth takes a coordinate and a desired byte, and returns +// all adjacent coordinates that contain that byte, Orthogonally +func (m *CoordByteMap) FindAnyAdjacentOrth(st Coordinate, val []byte) []Coordinate { + return m.AnyContainAny([]Coordinate{st.North(), st.East(), st.South(), st.West()}, val) +} + +func (m *CoordByteMap) AnyContainAny(check []Coordinate, val []byte) []Coordinate { + var ret []Coordinate + for _, wrk := range check { + for _, bt := range val { + if m.Get(wrk) == bt { + ret = append(ret, wrk) + } + } + } + return ret +} + func (m *CoordByteMap) Count(b byte) int { var ret int for y := m.TLY; y <= m.BRY; y++ {