mirror of
https://github.com/cubixle/codekata-golang.git
synced 2026-04-24 21:24:46 +01:00
31 lines
402 B
Go
31 lines
402 B
Go
package main
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func main() {
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}
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func goodPairsCount(src []int) int {
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count := 0
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l := len(src)
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for i := 0; i < l; i++ {
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for j := i + 1; j < l; j++ {
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if src[i] == src[j] {
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count++
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}
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}
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}
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return count
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}
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func goodPairsCount2(src []int) int {
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m := make(map[int]int)
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for _, n := range src {
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m[n] += 1
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}
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count := 0
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for _, v := range m {
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count += v * (v - 1) / 2
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}
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return count
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}
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