def main():
    expression = input()

    if expression[0] in ("+", "-"):
        op_idx = min(expression.find("+", 1) % len(expression),
                     expression.find("-", 1) % len(expression))
    else:
        op_idx = min(expression.find("+") % len(expression),
                     expression.find("-") % len(expression))

    num1 = int(expression[:op_idx])
    num2 = int(expression[op_idx+1:])

    match expression[op_idx]:
        case "+":
            print(num1-num2)
        case "-":
            print(num1+num2)


if __name__ == "__main__":
    main()