Problem: One very experienced problem writer decided to prepare a problem for April Fools Day contest. The task was very simple - given an arithmetic expression, return the result of evaluating this expression. However, looks like there is a bug in the reference solution...

Input

The only line of input data contains the arithmetic expression. The expression will contain between 2 and 10 operands, separated with arithmetic signs plus and/or minus. Each operand will be an integer between 0 and 255, inclusive.

Output

Reproduce the output of the reference solution, including the bug.

Examples

Input

8-7+6-5+4-3+2-1-0


Output

4


Input

2+2


Output

-46


Input

112-37


Output

375

Solution (in PYTHON3):

Solution:
s = input()
val = eval(s)
for i in range(len(s)):
    if s[i] ==  '+':
        j = i + 1
        c = -5
        while j < len(s) and s[j] != '+' and s[j] != '-':
            c *= 10
            j += 1
        val += c
    elif s[i] == '-':
        j = i + 1
        c = 3
        while j < len(s) and s[j] != '+' and s[j] != '-':
            c *= 10
            j += 1
        val += c
print(val)