Submission

Score: 100

User: eippy

Problemset: เลขหลักของผลคูณ

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-13 08:33:19

#include<iostream>
using namespace std;
int main(){
    int a,b,dx,x,digit[15];
    cin >> a;
    cin >> b;
    cin >> dx;
    x = a*b;
    int i=0;
    while (x > 0){
        digit[i] = x%10;
        x /= 10;
        i++;
    }
    if (i < dx){
        cout << "_";
        return 0;
    }
    for (int j=0; j<i/2; j++){
        int temp = digit[j];
        digit[j] = digit[i-j-1];
        digit[i-j-1] = temp;
    }
    cout << digit[dx-1];
    return 0;
}