Submission
Status:
PPPPPPPPPP
Score: 100
User: Cmoss9
Problemset: เลขหลักของผลคูณ
Language: c
Time: 0.001 second
Submitted On: 2024-10-16 21:32:16
#include <stdio.h>
int main () {
long long a,b,multi;
scanf("%lld %lld",&a,&b);
int digit;
scanf("%d",&digit);
multi = a*b;
long long temp = multi;
int count = 0;
while (temp>0) {
temp/=10;
count++;
}
long long arr[count];
for (int i = 0;i<count;i++) {
arr[i] = multi%10;
multi /= 10;
}
long long reverse[count];
for (int i = 0;i<count;i++) {
reverse[i] = arr[count-i-1];
}
if (digit>count) {
printf("_");
return 0;
}
printf("%d",reverse[digit-1]);
}