22 lines
444 B
Go
22 lines
444 B
Go
// Package q172 implements a solution for https://leetcode.com/problems/factorial-trailing-zeroes/
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package q172
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// Note: actually, counting 5 alone is enough since 2 certainly occurs more than 5.
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func trailingZeroes(n int) int {
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count2, count5 := 0, 0
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for i := 2; i <= n; i++ {
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num := i
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for num%2 == 0 {
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num /= 2
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count2++
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}
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for num%5 == 0 {
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num /= 5
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count5++
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}
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}
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return min(count2, count5)
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}
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var _ = trailingZeroes
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