题库练习 Divisibility by 25
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A11819 | Divisibility by 25

时间限制1s
内存限制256MB
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题目描述

You are given an integer $n$ from $1$ to $10^{18}$ without leading zeroes.

In one move you can swap any two adjacent digits in the given number in such a way that the resulting number will not contain leading zeroes. In other words, after each move the number you have cannot contain any leading zeroes.

What is the minimum number of moves you have to make to obtain a number that is divisible by $25$ ? Print -1 if it is impossible to obtain a number that is divisible by $25$ .

输入格式

The first line contains an integer $n$ ( $1 \le n \le 10^{18}$ ). It is guaranteed that the first (left) digit of the number $n$ is not a zero.

输出格式

If it is impossible to obtain a number that is divisible by $25$ , print -1. Otherwise print the minimum number of moves required to obtain such number.

Note that you can swap only adjacent digits in the given number.

输入输出样例

输入 #1
5071
输出 #1
4
输入 #2
705
输出 #2
1
输入 #3
1241367
输出 #3
-1
C++ 编辑器
输入
输出