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:
9301 + 1619 - 7459 + 5871 + 2497 + 4093 + 7957 - 1085 - 6698

Ex Output:
2506


Ex Input:
1451 - 4488 + 4665 + 526 - 3690 + 9483

Ex Output:
-5045


Ex Input:
9006 + 8673 - 5652 - 1238 + 5545 + 7076 - 9832 + 6692 - 4306

Ex Output:

2048