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:
def mp():
    return map(int, input().split())

s = input() + '+'
r = 0
a = 0
z = '+'
for i in s:
    #print(r, a, z)
    if i in '+-':
        if z == '+':
            r += a
        else:
            r -= a
        z = i
        a = 0
    a *= 10
    a += ord(i) - ord('0')
    
print(r)