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>

#define MAX pow(10, 18)
int main(void){
	int N;
	long long int a, i, mul=1;
	scanf("%d", &N);
	for (i = 0; i < N; i++){
		scanf("%ld", &a);
		mul = a * mul;

	}
	if (mul >= MAX){
		printf("-1");
	}
	else {
		printf("%ld\n",mul);
	}
	return 0;

}