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:
8220 - 9787 + 1100 - 7425

Ex Output:
24332


Ex Input:
4495 + 1180 - 7554 - 4842

Ex Output:
15711


Ex Input:
59 - 2968 + 2212 + 3696 + 334 + 3679 - 7146

Ex Output:

252