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>
using namespace std;
int main() {

	int n;
	cin>>n;
	long long pro=1;
	long long t;
	while(n--){
		cin>>t;
		if(t>1000000000000000000/pro){
			cout<<-1<<"\n";
			return 0;
		}
		if(t==0){
			cout<<0<<"\n";
			return 0;
		}
		else{
			pro*=t;
		}
		
	}
	cout<<pro<<"\n";
}