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 Pascal (FPC 3.0.4) (judge verdict: Accepted)

var

  A, B : longint;
  s, hi, ss : char;
  
begin

  readln(A, s, hi, ss, B);
  
  if hi = '+' then
    writeln(A + B)
  else
    writeln(A - B);

end.