Problem:
Simple Calculator

Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.

The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.

Input

The input consists of multiple datasets. Each dataset is given in the following format.

a op b

The input ends with a dataset where op = '?'. Your program should not process for this dataset.

Output

For each dataset, print the value in a line.

Constraints

0 ≤ a, b ≤ 20000

No divisions by zero are given.

Sample Input 1

1 + 2
56 - 18
13 * 2
100 / 10
27 + 81
0 ? 0

Sample Output 1

3
38
26
10
108

Solution in Ruby (judge verdict: Wrong Answer)

input_line = gets.chomp.split(" ")

input_line.each do |line|

  a = line[0].to_i
  b = line[2].to_i
  op = line[1].to_s

  if op == "?"
    break
  else
    case op
    when "+" then
      puts a + b
    when "-" then
      puts a - b
    when "*" then
      puts a * b
    when "/" then
      puts a / b
    end
  end
end