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:
8455 + 5516 - 2131 + 6151 + 6314 + 9308 + 5493

Ex Output:
-22196


Ex Input:
4101 + 2536 - 502

Ex Output:
2067


Ex Input:
8698 - 7378 - 9188 + 5767 - 2935 - 2532 + 7113

Ex Output:

17851