Educational Codeforces Round 80 (Rated for Div. 2) B

B. Yet Another Meme Problem

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#include<stdio.h>
int main()
{
    int t;
    for(scanf("%d",&t);t--;)
    {
        long long n, d, c = 0, t = 9;
        scanf("%lld %lld",&n,&d);
        while(t <= d)
        {
            static_cast<void>(c++) , t = t * 10 + 9;
            
        }
        printf("%lld\n",n * c);
    }
    
    return  0;
}

来源：CSDN

作者：king9666

链接：https://blog.csdn.net/king9666/article/details/103996271