BODMAS

def precedence(op):
    if op in ('+', '-'):
        return 1
    if op in ('*', '/'):
        return 2
    return 0

def apply_op(a, b, op):
    if op == '+': return a + b
    if op == '-': return a - b
    if op == '*': return a * b
    if op == '/': return a // b  # integer division as per typical CP problems

def evaluate(tokens):
    values = []
    ops = []
    i = 0
    while i < len(tokens):
        if tokens[i] == ' ':
            i += 1
            continue
        elif tokens[i] == '(':
            ops.append(tokens[i])
        elif tokens[i].isdigit():
            val = 0
            while i < len(tokens) and tokens[i].isdigit():
                val = val * 10 + int(tokens[i])
                i += 1
            values.append(val)
            i -= 1
        elif tokens[i] == ')':
            while ops and ops[-1] != '(':
                b = values.pop()
                a = values.pop()
                op = ops.pop()
                values.append(apply_op(a, b, op))
            ops.pop()  # remove '('
        else:
            while ops and precedence(ops[-1]) >= precedence(tokens[i]):
                b = values.pop()
                a = values.pop()
                op = ops.pop()
                values.append(apply_op(a, b, op))
            ops.append(tokens[i])
        i += 1

    while ops:
        b = values.pop()
        a = values.pop()
        op = ops.pop()
        values.append(apply_op(a, b, op))

    return values[-1]

# Read the whole expression as a single line
expr = input().strip()
print(evaluate(expr))