In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Input: Consider Input: 452 - 5631 - 8307 - 1886 + 4631 + 1695 + 4411 - 769

Output: 6308


Input: Consider Input: 8929 - 6145 + 8551 - 1836 + 9159

Output: -800


Input: Consider Input: 6585 + 9118 - 1980 + 4000 + 3883 + 1835 + 5080


Output: -15351