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:
23 - 7991 - 1064 + 8364

Ex Output:
714


Ex Input:
8513 - 7119 - 47

Ex Output:
15679


Ex Input:
8731 - 8854 - 3703 - 5630 + 5458 - 9102 + 1272

Ex Output:

29290