Problem:
Score : 100 points

Problem Statement

Joisino wants to evaluate the formula "A op B".
Here, A and B are integers, and the binary operator op is either + or -.
Your task is to evaluate the formula instead of her.

Constraints

1≦A,B≦10^9

op is either + or -.

Input

The input is given from Standard Input in the following format:

A op B

Output

Evaluate the formula and print the result.

Sample Input 1

1 + 2

Sample Output 1

3

Since 1 + 2 = 3, the output should be 3.

Sample Input 2

5 - 7

Sample Output 2

-2

Solution in JavaScript (Node.js 12.16.1) (judge verdict: Wrong Answer)

function main(input) {
  input = input.trim();
  const a = input.split(' ').map(Number);
  
  if(a[1]=='+'){
    console.log(parseInt(a[0])+parseInt(a[2]))
  }else if(a[1]=='-'){
    console.log(parseInt(a[0])-parseInt(a[2]))
  }
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));