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.

Examples

Input

1 + 2


Output

3


Input

5 - 7


Output

-2
# -*- coding: utf-8 -*-
"""
Created on Wed Feb 22 16:06:57 2017

@author: 0048005387
"""

strA, op, strB = map(str, raw_input().split())
A = int(strA)
B = int(strB)

if op == '+':
	print(A+B)
elif op == '-':
	print(A-B)
