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 Julia (0.5.0) (judge verdict: Accepted)

function f()
    input = split(chomp(readline()), " ")
    A = parse(Int, input[1])
    op = input[2]
    B = parse(Int, input[3])

    if op == "+"
        ret = A + B
    else
        ret = A - B
    end

    print(ret)
end
f()