leetcode算法题--生成特殊数字的最少操作

原题链接：https://leetcode.cn/problems/minimum-operations-to-make-a-special-number/description/

感觉还是比较难想到的。。

func minimumOperations(num string) int {res := len(num)if strings.Contains(num, "0") {res-- }f := func(tail string) {i := strings.LastIndexByte(num, tail[1]) if i < 0 {return}i = strings.LastIndexByte(num[:i], tail[0])if i < 0 {return}res = min(res, len(num)-i-2)}f("00")f("25")f("50")f("75")return res
}func min(a, b int) int {if a < b {return a}return b
}