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:
1592 + 7031 - 1902 + 5922 - 1351 + 8340 - 2032

Ex Output:
-14416


Ex Input:
1185 - 6431 + 1326 - 2840 - 9276

Ex Output:
18406


Ex Input:
2622 - 4115 + 7974 + 7475 - 967

Ex Output:

-7745