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:
4397 - 3478 - 9837 - 7164 + 7972 + 3676

Ex Output:
13228


Ex Input:
8379 + 6247 - 4435 + 207 - 3793 + 7248 + 1488

Ex Output:
1417


Ex Input:
2095 - 8968 - 1037 + 8059 + 5202 - 9764 - 7103

Ex Output:

15706