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:
2776 - 8931 + 2788 + 8315 - 6570 + 8385 - 2789

Ex Output:
1578


Ex Input:
1928 - 8869 + 937 + 6209 + 5391 - 5357 + 6743

Ex Output:
-3126


Ex Input:
9199 + 4877 - 9774 + 8261 + 1223 + 8942 + 3508 - 3906

Ex Output:

-3932