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 <stdlib.h>

int main()
{
  	int n;
	int *a;
	long result;
  
  	result = 1;
  
  	scanf("%d",&n);
    a = (int*)malloc(sizeof(int)*n);
  
  	for(int i = 0; i < n; i++)
    {
      scanf("%d",&a[i]);
    }
  
  	for(int i = 0; i < n; i++)
    {
     	result *= (long)a[i];
    }
 	
  	if(result > 1000000000000000000)
  	{
      	result = -1;
    } 
	printf("%ld\n",result);
    return 0; 
}