B1086 就不告诉你

题目：https://pintia.cn/problem-sets/994805260223102976/problems/1038429065476579328

这题坑点在开头的数字可能是0，需要判断一下

代码

#include<cstdio>
int main(){
    int a, b;
    scanf("%d%d", &a, &b);
    int mul = a * b, flag = 1;
    while(mul != 0){
        if(flag == 1 && mul % 10 == 0){
            mul /= 10;
            continue;
        }
        printf("%d", mul % 10);
        flag = 0;
        mul /= 10;
    }
}