Day 6 Complete
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650
day06/input
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650
day06/input
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||||
zreoslve
|
||||
lcexflbp
|
||||
erkaxhyf
|
||||
uflifmci
|
||||
byfovhfn
|
||||
pmlsjebs
|
||||
rmdncvno
|
||||
jzxsteml
|
||||
ehromnts
|
||||
wwrgqdmv
|
||||
gydqxmbb
|
||||
kjjnrsyf
|
||||
okzknoil
|
||||
pqmjbnhz
|
||||
rbgydndw
|
||||
jfmclxjm
|
||||
bfotvtud
|
||||
mftuqeei
|
||||
lhchcrja
|
||||
czperrwe
|
||||
hyymnbfh
|
||||
gtmctpcn
|
||||
ooteayaj
|
||||
ipxmxdrg
|
||||
lxljcbmk
|
||||
kexfnhaz
|
||||
zwvwqxwd
|
||||
ccriznpe
|
||||
gadlykes
|
||||
nuagvrrv
|
||||
xgvdaxfk
|
||||
gnkzxirj
|
||||
vdmrccgf
|
||||
vhgjcski
|
||||
qpdhafox
|
||||
oijrjuwm
|
||||
qxtyktrs
|
||||
mkyalzfa
|
||||
tnmunnod
|
||||
ukjvbgjs
|
||||
cywsgmfc
|
||||
uqkzjgbn
|
||||
ppjifbhj
|
||||
gpwlnflu
|
||||
alabzvvi
|
||||
vtygcqph
|
||||
ezxtvdqo
|
||||
hzeejxxe
|
||||
aavwflnw
|
||||
nrfqefxa
|
||||
dsgysuua
|
||||
pikwyfym
|
||||
nesdcxdi
|
||||
ghqlicny
|
||||
jcvekqdr
|
||||
cyeiicma
|
||||
slfxqsdt
|
||||
dcrcwoek
|
||||
qdmtpdxr
|
||||
vlzjoqfm
|
||||
55
day06/main.go
Normal file
55
day06/main.go
Normal file
@ -0,0 +1,55 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"fmt"
|
||||
"os"
|
||||
)
|
||||
|
||||
func main() {
|
||||
input := stdinToStringSlice()
|
||||
var partOne, partTwo string
|
||||
for j := range input[0] {
|
||||
freq := make(map[byte]int)
|
||||
for i := range input {
|
||||
freq[input[i][j]]++
|
||||
}
|
||||
partOne += getTopByte(freq)
|
||||
partTwo += getBottomByte(freq)
|
||||
}
|
||||
fmt.Println("Answer to Part 1: " + partOne)
|
||||
fmt.Println("Answer to Part 2: " + partTwo)
|
||||
}
|
||||
|
||||
func getTopByte(f map[byte]int) string {
|
||||
var topByte byte
|
||||
var topByteCnt int
|
||||
for k, v := range f {
|
||||
if v > topByteCnt {
|
||||
topByteCnt = v
|
||||
topByte = k
|
||||
}
|
||||
}
|
||||
return string(topByte)
|
||||
}
|
||||
|
||||
func getBottomByte(f map[byte]int) string {
|
||||
var botByte byte
|
||||
var botByteCnt int
|
||||
for k, v := range f {
|
||||
if v < botByteCnt || botByte == 0 {
|
||||
botByteCnt = v
|
||||
botByte = k
|
||||
}
|
||||
}
|
||||
return string(botByte)
|
||||
}
|
||||
|
||||
func stdinToStringSlice() []string {
|
||||
var input []string
|
||||
scanner := bufio.NewScanner(os.Stdin)
|
||||
for scanner.Scan() {
|
||||
input = append(input, scanner.Text())
|
||||
}
|
||||
return input
|
||||
}
|
||||
69
day06/problem
Normal file
69
day06/problem
Normal file
@ -0,0 +1,69 @@
|
||||
Advent of Code
|
||||
|
||||
--- Day 6: Signals and Noise ---
|
||||
|
||||
Something is jamming your communications with Santa. Fortunately, your signal is only partially jammed, and protocol in situations like this is to switch to
|
||||
a simple repetition code to get the message through.
|
||||
|
||||
In this model, the same message is sent repeatedly. You've recorded the repeating message signal (your puzzle input), but the data seems quite corrupted -
|
||||
almost too badly to recover. Almost.
|
||||
|
||||
All you need to do is figure out which character is most frequent for each position. For example, suppose you had recorded the following messages:
|
||||
|
||||
eedadn
|
||||
drvtee
|
||||
eandsr
|
||||
raavrd
|
||||
atevrs
|
||||
tsrnev
|
||||
sdttsa
|
||||
rasrtv
|
||||
nssdts
|
||||
ntnada
|
||||
svetve
|
||||
tesnvt
|
||||
vntsnd
|
||||
vrdear
|
||||
dvrsen
|
||||
enarar
|
||||
|
||||
The most common character in the first column is e; in the second, a; in the third, s, and so on. Combining these characters returns the error-corrected
|
||||
message, easter.
|
||||
|
||||
Given the recording in your puzzle input, what is the error-corrected version of the message being sent?
|
||||
|
||||
Your puzzle answer was ________.
|
||||
|
||||
--- Part Two ---
|
||||
|
||||
Of course, that would be the message - if you hadn't agreed to use a modified repetition code instead.
|
||||
|
||||
In this modified code, the sender instead transmits what looks like random data, but for each character, the character they actually want to send is
|
||||
slightly less likely than the others. Even after signal-jamming noise, you can look at the letter distributions in each column and choose the least common
|
||||
letter to reconstruct the original message.
|
||||
|
||||
In the above example, the least common character in the first column is a; in the second, d, and so on. Repeating this process for the remaining characters
|
||||
produces the original message, advent.
|
||||
|
||||
Given the recording in your puzzle input and this new decoding methodology, what is the original message that Santa is trying to send?
|
||||
|
||||
Your puzzle answer was ________.
|
||||
|
||||
References
|
||||
|
||||
Visible links
|
||||
. http://adventofcode.com/
|
||||
. http://adventofcode.com/2016/about
|
||||
. http://adventofcode.com/2016/support
|
||||
. http://adventofcode.com/2016/events
|
||||
. http://adventofcode.com/2016/settings
|
||||
. http://adventofcode.com/2016/auth/logout
|
||||
. http://adventofcode.com/2016
|
||||
. http://adventofcode.com/2016
|
||||
. http://adventofcode.com/2016/leaderboard
|
||||
. http://adventofcode.com/2016/stats
|
||||
. http://adventofcode.com/2016/sponsors
|
||||
. http://adventofcode.com/2016/sponsors
|
||||
. https://en.wikipedia.org/wiki/Repetition_code
|
||||
. http://adventofcode.com/2016
|
||||
. http://adventofcode.com/2016/day/6/input
|
||||
Loading…
Reference in New Issue
Block a user