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.

Ex Input:
8085 + 9109 - 9653

Ex Output:
8629


Ex Input:
7312 - 1598 - 5813 - 8994 + 9174 - 4767 + 4076

Ex Output:
15234


Ex Input:
4222 - 4010 - 3630 + 3618 - 7821 - 6537 - 5363 - 8724 - 3882

Ex Output:

40571