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:
6667 - 31 + 1584 - 1542 - 6475 + 9319 + 2509 - 1895

Ex Output:
3198


Ex Input:
3664 - 184 - 3835 + 2124 - 1567 - 8341 - 3628 - 8279

Ex Output:
27374


Ex Input:
6750 + 5215 + 6695 - 5206 + 4211 - 838 - 897

Ex Output:

-2430