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

Ex Output:
6308


Ex Input:
4151 + 4432 - 9403 + 9800 - 901 + 5508 + 3237

Ex Output:
-8522


Ex Input:
581 - 2278 + 452 - 5411 - 7564 + 8148 - 2350 - 8956 - 4877

Ex Output:

23417