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:
7427 + 8795 - 4104 + 7720 - 6667

Ex Output:
1683


Ex Input:
2982 + 9912 - 1386 + 7183 + 259 - 2370

Ex Output:
-10616


Ex Input:
1152 + 8244 + 2746 - 6337 + 2703 - 9703

Ex Output:

3499