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 a;
  cin >> a;
  long long b=1;
  for (int i=0;i<a;i++) {
    long long c;
    cin >> c;
    if (b==-1) continue;
    else if ((b*c/(10^18))>=1) b=-1;
    else b*=c;
  }
  cout << b;
  return 0;
}