package q944

func minDeletionSize(strs []string) int {
	nDel := 0
	for col := range len(strs[0]) {
		for row := 1; row < len(strs); row++ {
			if strs[row][col] < strs[row-1][col] {
				nDel++
				break
			}
		}
	}
	return nDel
}

var _ = minDeletionSize