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: Wrong Answer)

program taskD2;
var
    a,b : longint;
    op : char;
    ans : longint;
    
begin
    readln(a);
    readln(op);
    readln(b);
    if op = '+' then
    begin
        ans := a + b
    end
    else 
    begin
        ans := a - b;
    end;
    writeln(ans);
end.