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 Java (OpenJDK 1.8.0) (judge verdict: Runtime Error)

import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    if(n < 2 && n > 100000){
      n = sc.nextInt();
    }
    long x = 0L;
    long goukei = 0L;
    for(int i = 1 ; i <= n ; i++){
      x = sc.nextLong();
      if(x < 0L && x >1000000000000000000L){
        x = sc.nextLong();
      }
      if(i == 1){
        goukei = x;
      }else{
        goukei = goukei * x;
      }
    }
    if(goukei > 1000000000000000000L){
      System.out.println("-1");
    }else{
      System.out.println(goukei);
    }
    
  }
}