Problem:
Score : 100 points

Problem Statement

Compute A \times B.

Constraints

1 \leq A \leq 100

1 \leq B \leq 100

All values in input are integers.

Input

Input is given from Standard Input in the following format:

A B

Output

Print the value A \times B as an integer.

Sample Input 1

2 5

Sample Output 1

10

We have 2 \times 5 = 10.

Sample Input 2

100 100

Sample Output 2

10000

Solution in C (GCC 9.2.1) (judge verdict: Wrong Answer)

#include <stdio.h>
#include <math.h>

#define e pow(10,18);

int main ()
{
    int N;
    long long i,A[100005],n,zero;
    scanf("%d",&N);
    zero=0;
    n=e;
        for (i=0;i<N;i++)
    {
        scanf ("%lld",&A[i]);
        if (A[i]==0)
            zero++;
    }
        if (zero>=1)
        {
            printf("0\n");
            return 0;
        }
       long long m=1;
     for (i=0;i<N;i++)
     {
         if (A[i]<=n/m)
         {
             m=m*A[i];
         }
         else
         {
             printf("-1\n");
             return 0;
         }
     }
    printf("%lld\n",m);
    return 0;
}