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>

int main(void)
{
    int n;
    scanf("%d",&n);
    long long int mul=1;
    while(n--)
    {
        long long int z;
        scanf("%I64dll",&z);
        mul*=z;;
    }

    if(mul>1e18)
        {
            printf("%d ",-1);
            return 0;
        }

    printf("%I64d",mul);

    return 0;
}