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:
4195 + 6940 - 1053 - 4433 + 1540

Ex Output:
1201


Ex Input:
9231 - 9608 - 4765 - 8085 - 9489

Ex Output:
41178


Ex Input:
5959 + 2720 - 934 - 3785 + 7244 - 976

Ex Output:

1690