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:
7291 - 941 - 33 + 3812 + 4851 - 8716 - 6838 - 740

Ex Output:
15896


Ex Input:
496 + 5072 + 6259 + 1493 + 4824 + 2052 + 4751 - 8038

Ex Output:
-15917


Ex Input:
1229 - 4354 + 912 - 1766

Ex Output:

6437