Submission

Score: 70

User: Chawin

Problemset: เลขหลักของผลคูณ

Language: c

Time: 0.001 second

Submitted On: 2025-10-08 05:02:48

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

    int n = a*b, i = 0;
    char ab[100001];
    while(n > 0){
        ab[i++] = (n%10)+48;
        n /= 10;
    }
    
    int r = 1;
    for(int i = strlen(ab)-1; i >= 0; i--){
        if(r == x){
            printf("%c", ab[i]);
            return 0;
        }
        r++;
    }
    printf("-");


    return 0; 
}