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:
8929 - 6145 + 8551 - 1836 + 9159

Ex Output:
-800


Ex Input:
5360 + 7507 - 3329 + 6345 - 9328 + 3114

Ex Output:
1051


Ex Input:
5010 + 1778 + 6035 - 887 - 1896 - 4285

Ex Output:

4265