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 <bits/stdc++.h>
#define endl '\n'
using namespace std;

int main(){
	long long n, b, res=1;
	cin >>n;
	while (n--){
		cin >>b;
		res *=b;
	}
	if (res > (long long)pow(10, 18)+ 1)
		cout << -1 << endl;
		else cout << res << endl;
}