34 lines
698 B
Go
34 lines
698 B
Go
package main
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func commonChars(words []string) []string {
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A := int('a')
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countCharacters := func(counters []int, word string) {
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for _, c := range word {
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counters[int(c)-A]++
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}
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}
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setCommon := func(common []int, word []int) {
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for i, count := range word {
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common[i] = min(common[i], count)
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}
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}
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commonCounters := make([]int, 26)
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countCharacters(commonCounters, words[0])
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for _, word := range words {
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wordCounters := make([]int, 26)
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countCharacters(wordCounters, word)
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setCommon(commonCounters, wordCounters)
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}
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var result []string
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for i, count := range commonCounters {
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for count > 0 {
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result = append(result, string(rune(A+i)))
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count--
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}
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}
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return result
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}
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