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()

ops = []

for i in range(0,len(s)):
    ch = s[i]
    if ch == '+' or ch == '-':
        ops.append(i)
ops.append(len(s))


for i in range(0,len(ops)-1):
    ch = s[ops[i]]
    if ch == '-':
        s += '+3'
    if ch == '+':
        s += '-5'
    for j in range(ops[i], ops[i + 1] - 1):
        s += '0'

#print(s)
print(eval(s))