CodeForces 808A Lucky Year（思维）

题目链接：点击打开链接

思路：无敌水思维题。

// CodeForces 808A Lucky Year 运行/限制：31ms/1000ms#include <cstdio>#include <cstring>#include <algorithm>#include <cmath>#include <iostream>using namespace std;int main(){int num;while (scanf("%d", &num) != EOF) {int t = num;int len = (int)log10(t);//最高位后有几位for (int i = 0; i < len; i++) {t /= 10;}t++;for (int i = 0; i < len; i++) {t *= 10;}printf("%d\n", t - num);}    return 0;}