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:
1259 - 2367 + 9919 + 7196 + 4121

Ex Output:
-17610


Ex Input:
7533 + 2213 - 7566 + 455 - 6321 - 2480 + 1023 + 2407

Ex Output:
17802


Ex Input:
5787 + 2012 - 3009 - 2675 - 482

Ex Output:

9941