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:
4444 + 4575 - 2114 - 4099

Ex Output:
6082


Ex Input:
9090 + 9847 - 1549 + 9673

Ex Output:

-8881