def evaluate(expr: str) -> int:
    expr = expr.replace(" ", "")
    pos = 0
    
    def number():
        nonlocal pos
        start = pos
        if pos < len(expr) and expr[pos] in '+-':
            pos += 1
        while pos < len(expr) and expr[pos].isdigit():
            pos += 1
        return int(expr[start:pos])
    
    def factor():
        nonlocal pos
        if pos < len(expr) and expr[pos] == '(':
            pos += 1
            result = expression()
            if pos >= len(expr) or expr[pos] != ')':
                raise ValueError
            pos += 1
            return result
        return number()
    
    def term():
        nonlocal pos
        result = factor()
        while pos < len(expr) and expr[pos] in '*/':
            op = expr[pos]
            pos += 1
            if op == '*':
                result *= factor()
            else:
                num = factor()
                if num == 0:
                    raise ValueError
                result //= num
        return result
    
    def expression():
        nonlocal pos
        result = term()
        while pos < len(expr) and expr[pos] in '+-':
            op = expr[pos]
            pos += 1
            if op == '+':
                result += term()
            else:
                result -= term()
        return result
    
    result = expression()
    if pos < len(expr):
        raise ValueError
    return result


expr = input()
print(evaluate(expr))