Submission

Score: 100

User: Newton4566

Problemset: เลขหลักของผลคูณ

Language: cpp

Time: 0.003 second

Submitted On: 2026-09-21 14:51:10

#include <iostream>
#include <string>
#include <cmath>
using namespace std;

int main() {
    long A, B, x;
    cin >> A;
    cin >> B;
    cin >> x;

    long n = A * B;
    string number = to_string(n);
    int digit[number.length()] = {0};

    for (unsigned int i = 0; i < number.length(); i++) {
        digit[i] = (int)number[i] - '0';
    }

    if (x > number.length()) {
        cout << "_\n";
        return 0;
    }

    int result = digit[x - 1];



    cout << result << endl;

    return 0;
}