Submission

Score: 100

User: GONGGONG

Problemset: เลขหลักของผลคูณ

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-04 12:22:58

#include <iostream>
using namespace std;

int main(){
    int a,b,x;cin>>a>>b>>x;
    int base=1,n;
    for(int i=0;base<=a*b;i++){
        base*=10;
        n=i+1;
    }
    if(x>n){
        cout<<'_';
        return 0;
    }
    for(int i=0;i<x;i++){
        if(i+1==x) cout<<(a*b%base-a*b%(base/10))/(base/10);
        base/=10;
    }
}