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 taskD;
var
    sum : int64;
    e,f,g,h,l : char;
    i,b,c,x,y : longint;
begin
    sum := 0;
    read(e);
    read(f);
    read(g);
    read(h);
    read(l);
    val(e,b,x);
    val(l,c,y);
    if g = '+' then
        sum := b + c
    else 
        sum := b - c;
    writeln(sum);
end.