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:
7403 - 3327 + 5889 + 1034 + 1607 - 313

Ex Output:
2513


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

Ex Output:
14764


Ex Input:
9449 + 9764 - 2549 + 5167 - 8788 - 1600 + 1137 - 7148 + 66

Ex Output:

13400