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)

a = Array.new()
op = Array.new()
b = Array.new()
i = 0
c, op[0], d = gets.split
a[0] = c.to_i
b[0] = d.to_i
while a[i] != 0 && op[i] != "?" && b[i] != 0 do
	i += 1
	c, op[i], d = gets.split
	a[i] = c.to_i
	b[i] = d.to_i
end
i = 0
while a[i] != 0 && op[i] != "?" && b[i] != 0 do
	if op[i] == "+" then
		puts "#{a[i] + b[i]}"
	end
	if op[i] == "-" then
		puts "#{a[i] - b[i]}"
	end
	if op[i] == "*" then
		puts "#{a[i] * b[i]}"
	end
	if op[i] == "/" then
		puts "#{a[i] / b[i]}"
	end
	i += 1
end