Submission

Score: 70

User: Chawin

Problemset: เลขหลักของผลคูณ

Language: c

Time: 0.002 second

Submitted On: 2025-10-08 05:14:54

#include <stdio.h>
#include <string.h>
int main(){
    long int a, b, x;
    scanf("%ld %ld %ld", &a, &b, &x);

    long int n = a*b, i = 0;
    int ab[100001];
    while(n > 0){
        ab[i++] = (n%10);
        n /= 10;
    }

    if(i - x < 0) printf("-");
    else printf("%d", ab[i-x]);


    return 0; 
}