day1 done

Author: Tazer

day1/input.txt

@@ -0,0 +1,200 @@
+1028
+1987
+1938
+1136
+1503
+1456
+1107
+1535
+1946
+1986
+855
+1587
+1632
+1548
+1384
+1894
+1092
+1876
+1914
+1974
+1662
+1608
+2004
+1464
+1557
+1485
+1267
+1582
+1307
+1903
+1102
+1578
+1421
+1184
+1290
+1786
+1295
+1930
+1131
+1802
+1685
+1735
+1498
+1052
+1688
+990
+1805
+1768
+1922
+1781
+1897
+1545
+1591
+1393
+1186
+149
+1619
+1813
+1708
+1119
+1214
+1705
+1942
+1684
+1460
+1123
+1439
+1672
+1980
+1337
+1731
+1203
+1481
+2009
+1110
+1116
+1443
+1957
+1891
+1595
+1951
+1883
+1733
+1697
+1321
+1689
+1103
+1300
+1262
+1190
+1667
+1843
+1544
+1877
+1718
+1866
+1929
+1169
+1693
+1518
+1375
+1477
+1222
+1791
+1612
+1373
+1253
+1087
+1959
+1970
+1112
+1778
+1412
+1127
+1767
+1091
+1653
+1609
+1810
+1912
+1917
+935
+1499
+1878
+1452
+1935
+1937
+968
+1905
+1077
+1701
+1789
+1506
+1451
+1125
+1686
+1117
+1991
+1215
+1776
+1976
+846
+1923
+1945
+1888
+1193
+1146
+1583
+1315
+1372
+1963
+1491
+1777
+1799
+1363
+1579
+1367
+1863
+1983
+1679
+1944
+1654
+1953
+1297
+530
+1502
+1738
+1934
+1185
+1998
+1764
+1856
+1207
+1181
+1494
+1676
+1900
+1057
+339
+1994
+2006
+1536
+2007
+644
+1173
+1692
+1493
+1756
+1916
+1890
+1908
+1887
+1241
+1447
+1997
+1967
+1098
+1287
+1392
+1932

day1/main.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"bufio"
+	"flag"
+	"log"
+	"os"
+	"strconv"
+)
+
+func main() {
+
+	var version = flag.Int("version", 1, "first or second part of the assignment")
+
+	flag.Parse()
+
+	file, err := os.Open("input.txt")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+
+	inputs := []int{}
+
+	for scanner.Scan() {
+		i1, err := strconv.Atoi(scanner.Text())
+		if err != nil {
+			log.Fatal(err)
+		}
+		inputs = append(inputs, i1)
+	}
+
+	if err := scanner.Err(); err != nil {
+		log.Fatal(err)
+	}
+	if *version == 1 {
+		log.Printf("Result: %d 🎄", calculateAccouting(inputs))
+	} else {
+		log.Printf("Result: %d 🎄", calculateAccoutingVersion2(inputs))
+	}
+}
+
+func calculateAccouting(input []int) int {
+
+	for _, i := range input {
+		for _, i2 := range input {
+			if i+i2 == 2020 {
+				return i * i2
+			}
+		}
+	}
+	return 0
+}
+
+func calculateAccoutingVersion2(input []int) int {
+
+	for _, i := range input {
+		for _, i2 := range input {
+			for _, i3 := range input {
+				if i+i2+i3 == 2020 {
+					return i * i2 * i3
+				}
+			}
+		}
+	}
+	return 0
+}

day1/main_test.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestDay1(t *testing.T) {
+
+	sample := []int{1721, 979, 366, 299, 675, 1456}
+	expected := 514579
+
+	result := calculateAccouting(sample)
+
+	assert.Equal(t, result, expected)
+
+}
+
+func TestDay1Version2(t *testing.T) {
+
+	sample := []int{1721, 979, 366, 299, 675, 1456}
+	expected := 241861950
+
+	result := calculateAccoutingVersion2(sample)
+
+	assert.Equal(t, result, expected)
+
+}

go.mod

@@ -0,0 +1,5 @@
+module github.com/tazer/adventofcode2020
+
+go 1.15
+
+require github.com/stretchr/testify v1.6.1

go.sum

@@ -0,0 +1,11 @@
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+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=