-
Notifications
You must be signed in to change notification settings - Fork 1
/
aoc1.go
55 lines (47 loc) · 843 Bytes
/
aoc1.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
// aoc1.go --
// advent of code 2022 day 1
//
// https://adventofcode.com/2022/day/1
// https://github.com/erik-adelbert/aoc
//
// (ɔ) Erik Adelbert - erik_AT_adelbert_DOT_fr
// -------------------------------------------
// 2022-12-1: initial commit
package main
import (
"bufio"
"fmt"
"os"
)
func main() {
var m1, m2, m3, sum int
max3 := func() {
switch {
case sum > m1:
m1, m2, m3 = sum, m1, m2
case sum > m2:
m2, m3 = sum, m2
case sum > m3:
m3 = sum
}
}
input := bufio.NewScanner(os.Stdin)
for input.Scan() {
if line := input.Text(); len(line) > 0 {
sum += atoi(line)
continue
}
max3()
sum = 0
}
max3()
fmt.Println(m1, m1+m2+m3) // part 1 & 2
}
// strconv.Atoi simplified core loop
// s is ^\d+$
func atoi(s string) (n int) {
for i := range s {
n = 10*n + int(s[i]-'0')
}
return
}