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Commit 55977de

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day1
0 parents commit 55977de

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4 files changed

+299
-0
lines changed

4 files changed

+299
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lines changed

‎day1.go

Lines changed: 52 additions & 0 deletions
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package main
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import (
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"fmt"
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"strconv"
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)
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// SolveDay1 solves the puzzle for day1
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func SolveDay1(part int, lines *[]string) {
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switch p := part; p {
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case 1:
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solvePart1(lines)
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case 2:
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solvePart2(lines)
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}
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}
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func solvePart1(lines *[]string) {
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solution := 0
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for i, lineI := range *lines {
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valueI, _ := strconv.Atoi(lineI)
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for _, lineJ := range (*lines)[i+1:] {
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valueJ, _ := strconv.Atoi(lineJ)
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if valueI+valueJ == 2020 {
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solution = valueI * valueJ
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break
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}
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}
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}
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fmt.Println(solution)
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}
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func solvePart2(lines *[]string) {
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solution := 0
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for i, lineI := range *lines {
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valueI, _ := strconv.Atoi(lineI)
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for j, lineJ := range (*lines)[i+1:] {
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valueJ, _ := strconv.Atoi(lineJ)
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for _, lineK := range (*lines)[j+1:] {
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valueK, _ := strconv.Atoi(lineK)
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if valueI+valueJ+valueK == 2020 {
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solution = valueI * valueJ * valueK
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break
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}
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}
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}
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}
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fmt.Println(solution)
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}

‎inputs/day1.txt

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408
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1614
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1321
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1028
5+
1018
6+
2008
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1061
8+
1433
9+
1434
10+
1383
11+
1645
12+
1841
13+
1594
14+
1218
15+
1729
16+
1908
17+
1237
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1152
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1771
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1837
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1709
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1449
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1876
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1763
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1676
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1491
27+
1983
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1743
29+
1845
30+
999
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1478
32+
1929
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1819
34+
1385
35+
1308
36+
1703
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1246
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1831
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1964
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1469
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1977
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1488
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1698
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1640
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1513
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1136
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1794
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1685
49+
1802
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1520
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1807
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1654
53+
1547
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1917
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1792
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1949
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1268
58+
1626
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1493
60+
1534
61+
1700
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1844
63+
1146
64+
1049
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1811
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1627
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1630
68+
1755
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1887
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1290
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1446
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1968
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168
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1749
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1479
76+
1651
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1646
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1839
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14
80+
1918
81+
1568
82+
1554
83+
1926
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1942
85+
1862
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1966
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1536
88+
1599
89+
1439
90+
1766
91+
1643
92+
1045
93+
1537
94+
1786
95+
1596
96+
1954
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1390
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1981
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1362
100+
1292
101+
1573
102+
1541
103+
1515
104+
1567
105+
1860
106+
1066
107+
1879
108+
1800
109+
1309
110+
1533
111+
1812
112+
1774
113+
1119
114+
1602
115+
1677
116+
482
117+
1054
118+
1424
119+
1631
120+
1829
121+
1550
122+
1636
123+
1604
124+
185
125+
1642
126+
1304
127+
1843
128+
1773
129+
1667
130+
1530
131+
1047
132+
1584
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1958
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1160
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1570
136+
1705
137+
1582
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1692
139+
1886
140+
1673
141+
1842
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1402
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1517
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1805
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1386
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1165
147+
1867
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1153
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1467
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1473
151+
1803
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1967
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1485
154+
1448
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1922
156+
1258
157+
1590
158+
1996
159+
1208
160+
1241
161+
1412
162+
1610
163+
1219
164+
523
165+
1813
166+
1123
167+
1916
168+
1861
169+
1020
170+
1783
171+
1052
172+
1140
173+
1994
174+
1761
175+
747
176+
1885
177+
1675
178+
1957
179+
1476
180+
1382
181+
1878
182+
1099
183+
1882
184+
855
185+
1905
186+
1037
187+
1714
188+
1988
189+
1648
190+
1135
191+
1859
192+
1798
193+
1333
194+
1158
195+
1909
196+
652
197+
1934
198+
1830
199+
1442
200+
1224

‎main.go

Lines changed: 47 additions & 0 deletions
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package main
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import (
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"bufio"
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"flag"
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"fmt"
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"log"
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"os"
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)
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func main() {
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var dayFlag = flag.Int("d", 1, "advent of code day")
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var partFlag = flag.Int("p", 1, "advent of code day part")
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flag.Parse()
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inputFilePath := "./inputs/day" + fmt.Sprint(*dayFlag) + ".txt"
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var lines []string
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readLines(inputFilePath, &lines)
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solve(*dayFlag, *partFlag, &lines)
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}
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func solve(day int, part int, lines *[]string) {
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switch d := day; d {
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case 1:
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SolveDay1(part, lines)
29+
}
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}
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func readLines(filePath string, lines *[]string) {
33+
file, err := os.Open(filePath)
34+
if err != nil {
35+
fmt.Println("Couldn't read file.")
36+
}
37+
defer file.Close()
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scanner := bufio.NewScanner(file)
40+
for scanner.Scan() {
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line := scanner.Text()
42+
*lines = append(*lines, line)
43+
}
44+
if err := scanner.Err(); err != nil {
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log.Fatal(err)
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}
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}

‎run

2.21 MB
Binary file not shown.

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