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:
5360 + 7507 - 3329 + 6345 - 9328 + 3114

Ex Output:
1051


Ex Input:
2341 + 8929 + 4308 - 4344 - 7942 + 4320

Ex Output:

-2930