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author | Julien Dessaux | 2021-12-07 14:26:36 +0100 |
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committer | Julien Dessaux | 2021-12-07 14:26:36 +0100 |
commit | 6ed18289c89eaff3557907df63cf58bd2009b3ee (patch) | |
tree | 903d730030c18ab25c212938794c1c03f65f800f /2021/03/first.go | |
parent | Initial import (diff) | |
download | advent-of-code-6ed18289c89eaff3557907df63cf58bd2009b3ee.tar.gz advent-of-code-6ed18289c89eaff3557907df63cf58bd2009b3ee.tar.bz2 advent-of-code-6ed18289c89eaff3557907df63cf58bd2009b3ee.zip |
Added the first days
Diffstat (limited to '')
-rw-r--r-- | 2021/03/first.go | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/2021/03/first.go b/2021/03/first.go new file mode 100644 index 0000000..5343505 --- /dev/null +++ b/2021/03/first.go @@ -0,0 +1,42 @@ +package main + +import ( + "bufio" + "fmt" + "log" + "os" +) + +func main() { + f, err := os.Open("input") + if err != nil { + log.Fatalf("%+v", err) + } + defer f.Close() + + scanner := bufio.NewScanner(f) + scanner.Split(bufio.ScanLines) + + bits := make([]int, 12) + for scanner.Scan() { + num := scanner.Text() + for n := 0; n < 12; n++ { + if num[n] == '1' { + bits[n]++ + } + } + } + + gamma := 0 + epsilon := 0 + for n := 0; n < 12; n++ { + gamma *= 2 + epsilon *= 2 + if bits[n] > 500 { + gamma++ + } else { + epsilon++ + } + } + fmt.Println(gamma * epsilon) +} |