43 lines
713 B
Go
43 lines
713 B
Go
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package main
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import (
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"fmt"
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"internal/util"
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)
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func main() {
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lines := util.ReadInput()
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twos := 0
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threes := 0
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for _, id := range lines {
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// here we build up a map of letters and counts
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letters := make(map[byte]int)
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for i := 0; i < len(id); i++ {
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letters[id[i]] += 1
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}
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// these are the values to add to the 'twos' and 'threes'
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// count, respectively. They will only ever be 0 or 1.
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add2 := 0
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add3 := 0
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// now we iterate over the map of letter->count, and set
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// add2 and add3 if we find any values equal to 2 or 3
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for _, v := range letters {
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if v == 2 {
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add2 = 1
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}
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if v == 3 {
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add3 = 1
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}
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}
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twos += add2
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threes += add3
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}
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fmt.Println(twos * threes)
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}
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