day1.go

package main
import "fmt"
func main() {
	for i := 0; i < len(input); i++ {
		var first = input[i];
		for j := i; j < len(input); j++ {
			var second = input[j];
			var sum = first + second;
			var item = findItemsThatSum(2020, sum, input)
			if item > 0 {
				fmt.Println(first, second, item)
				fmt.Println(first * second * item)
			}
		}
	}
}

func findItemsThatSum(sum int, item int, list []int) int {
	for i := 0; i < len(list); i++ {
		var first = list[i];
		if first + item == sum {
			return first
		}
	}
	return 0
}

var input = []int{
	1714,
1960,
1256,
1597,
1853,
1609,
1936,
2003,
1648,
1903,
1248,
1525,
1330,
1281,
1573,
1892,
1563,
1500,
1858,
176,
1802,
1370,
1708,
1453,
1342,
1830,
1580,
1607,
1848,
1626,
1602,
1919,
1640,
1574,
1414,
766,
1581,
1924,
1727,
1949,
1406,
323,
957,
1862,
1354,
1427,
1583,
1067,
1863,
1553,
1923,
1990,
691,
1372,
1357,
1887,
1485,
1799,
1270,
1743,
1601,
1457,
1723,
1888,
1272,
1600,
1880,
1381,
1413,
1452,
277,
1866,
1542,
1693,
1760,
1637,
1675,
1975,
1304,
1327,
1985,
1842,
1255,
1915,
1266,
1944,
1824,
1770,
1392,
1259,
1313,
1547,
1293,
1393,
1896,
1828,
1642,
1979,
1871,
1502,
1548,
1508,
710,
1786,
1845,
1334,
1362,
1940,
2009,
1271,
1448,
1964,
1676,
1654,
1804,
1835,
1910,
1939,
1298,
1572,
1704,
1841,
1399,
1576,
1164,
1868,
1035,
262,
1569,
1639,
1669,
1543,
1616,
1658,
1750,
1765,
1718,
1861,
1351,
1531,
1665,
1771,
1348,
1289,
875,
1408,
1486,
1275,
1625,
1594,
1816,
704,
1800,
1564,
1291,
1234,
1981,
1843,
1387,
1938,
1827,
1883,
1911,
1755,
1353,
1808,
1498,
1416,
2006,
1916,
1411,
1539,
1963,
1874,
1898,
1951,
1292,
1366,
1912,
1369,
1478,
1359,
1859,
1421,
1384,
1534,
1283,
1913,
1794,
1494,
1860,
1312,
1869,
1730,
1510,
1319,
1428,
1706,
1432,
1532,
}