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 Scala (judge verdict: Wrong Answer)

import scala.io.Source

object Main extends App {
  val lines = Source.stdin.getLines.map { s => s.split(" ").toList }.toList.init

  for {
    line <- lines
    } yield { if (line.exists(s => s == "+")) println(line(0).toInt + line(2).toInt)
              else if (line.exists(s => s == "-")) println(line(0).toInt - line(2).toInt)
              else if (line.exists(s => s == "*")) println(line(0).toInt * line(2).toInt)
              else if (line.exists(s => s == "/")) println(line(0).toInt / line(2).toInt)
              else println("No match")
    }
}