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
#!/usr/bin/env python
# -*- coding:utf-8 -*-

def main():
    a, op, b = raw_input().split()
    if op == '+':
        result = int(a) + int(b)
    else:
        result = int(a) - int(b)
    print result


if __name__ == "__main__":
    main()