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:
5473 - 4337 - 6499 - 9119

Ex Output:
25428


Ex Input:
9403 + 6381 - 6599 - 2097 - 3046

Ex Output:
14764


Ex Input:
9902 - 8972 + 5382

Ex Output:

13492