2020 day 1 Complete

2020/day01/input

@@ -0,0 +1,200 @@
+1632
+1438
+1811
+1943
+1883
+1698
+1976
+1972
+1794
+1726
+1850
+1789
+1524
+1701
+1454
+1594
+1655
+1018
+1828
+1867
+1959
+1541
+1596
+1998
+1916
+1894
+1727
+1812
+1800
+1897
+1534
+1712
+1825
+1629
+1827
+81
+1855
+1621
+1694
+1663
+1793
+1685
+1616
+1899
+1688
+1652
+1719
+1589
+1649
+1742
+1905
+922
+1695
+1747
+1989
+1968
+1678
+1709
+1938
+1920
+1429
+1556
+2005
+1728
+1484
+1746
+1702
+1456
+1917
+1670
+1433
+1538
+1806
+1667
+1505
+963
+1478
+2003
+1955
+1689
+1490
+1523
+1615
+1784
+1624
+583
+1465
+1443
+1489
+1873
+1485
+1773
+1704
+352
+505
+1705
+1844
+1599
+1778
+1846
+1533
+1535
+1965
+1987
+828
+1755
+1823
+1639
+1981
+1763
+1758
+1819
+1569
+1580
+358
+1786
+1964
+1604
+1805
+1822
+1941
+1993
+1939
+1975
+1966
+1852
+1310
+1687
+1718
+641
+1715
+1995
+1603
+1444
+1641
+1961
+1536
+1771
+1267
+1749
+1944
+1519
+1445
+1818
+1558
+1922
+1452
+1901
+1915
+1957
+1840
+1785
+1946
+1683
+1918
+1847
+1690
+1716
+1627
+1571
+1985
+1455
+435
+1856
+1527
+1660
+1555
+1557
+1591
+1906
+1646
+1656
+1620
+1618
+1598
+1606
+1808
+1509
+1551
+1723
+1835
+1610
+1820
+1942
+1767
+1549
+1607
+1781
+1612
+1864
+2007
+1908
+1650
+1449
+1886
+1878
+1895
+1869
+1469
+1507

2020/day01/main.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+func main() {
+	inp := h.StdinToIntSlice()
+	fmt.Println("# Part 1")
+	part1(inp)
+	fmt.Println("# Part 2")
+	part2(inp)
+}
+
+func part1(input []int) {
+	for i := 0; i < len(input); i++ {
+		for j := i + 1; j < len(input); j++ {
+			if input[i]+input[j] == 2020 {
+				fmt.Printf("Entries %d and %d sum to 2020\n", i, j)
+				fmt.Printf("Answer: %d\n", input[i]*input[j])
+				return
+			}
+		}
+	}
+}
+
+func part2(input []int) {
+	for i := 0; i < len(input); i++ {
+		for j := i + 1; j < len(input); j++ {
+			for k := j + 1; k < len(input); k++ {
+				if input[i]+input[j]+input[k] == 2020 {
+					fmt.Printf("Entries %d, %d, and %d sum to 2020\n", i, j, k)
+					fmt.Printf("Answer: %d\n", input[i]*input[j]*input[k])
+					return
+				}
+			}
+		}
+	}
+}

2020/day01/testinput

@@ -0,0 +1,6 @@
+1721
+979
+366
+299
+675
+1456

helpers/helpers.go

@@ -76,6 +76,15 @@ func GetArgNumber(i int) string {
 	return ""
 }
 
+func StdinToIntSlice() []int {
+	var ret []int
+	st := StdinToStringSlice()
+	for _, v := range st {
+		ret = append(ret, Atoi(v))
+	}
+	return ret
+}
+
 func StdinToStringSlice() []string {
 	var input []string
 	scanner := bufio.NewScanner(os.Stdin)