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:
2269 + 7840 - 467 - 5626

Ex Output:
522


Ex Input:
7147 + 1234 - 7159 + 8304 - 934 + 3025 - 796 - 5291 - 2549

Ex Output:
11313


Ex Input:
5780 + 8677 - 272 - 8672 + 8625 - 2765 - 8913 - 1165 + 604

Ex Output:

9661