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.
while True:
    f = input()
    _, op, _ = f.split()

    if op == '?':
        break

    print(eval(f))
while True:
    f = input()
    _, op, _ = f.split()

    if op == '?':
        break

    print(int(eval(f)))