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:
1011 - 5404 + 4286 - 549 - 4178 - 1559

Ex Output:
8415


Ex Input:
6946 + 6834 - 1169 + 9756 + 2063 - 4750 - 425 + 1121 + 8155

Ex Output:
-14639


Ex Input:
8279 - 6979 + 469 + 5320 + 6955

Ex Output:

2514