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 PYTHON):

Solution:
ans = 0
now = 0
sign = 1
for i in raw_input():
    if i == '+' or i == '-':
        ans += now * sign
        now = 0
        sign = 1
        if i == '-':
            sign = -1
        now = ord(i) - ord('0')
        continue
    now = now * 10 + int(i)
print ans + now * sign