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:
6120 - 9271 - 7167 + 6916 - 2510 + 7854 - 7909 - 1960 - 3775

Ex Output:
23942


Ex Input:
6178 - 1637 - 8197 - 6437 + 4591 - 6995 + 3562 + 9474

Ex Output:
11817


Ex Input:
7556 - 7391 + 2684

Ex Output:

12263