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 Python (3.4.3) (judge verdict: Accepted)

import sys
import collections
import itertools
import math
import re
from collections import deque

# MOD = 10 ** 9 + 7

A, op, B = input().split()
A, B = int(A), int(B)

if op == "+":
    print(A + B)
else:
    print(A - B)