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:
e = input()

nr = 0
nrs = []
signs = []
for c in e:
    if not c.isdigit():
        nrs += [nr]
        signs += [c]
        nr = 0
    nr = nr*10 + ord(c) - ord('0')
nrs += [nr]
res = nrs[0]
for i in range(len(signs)):
    if signs[i] == '+':
        res += nrs[i+1]
    else:
        res -= nrs[i+1]
print(res)