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:
1562 + 8343 + 8480

Ex Output:
-15261


Ex Input:
2269 + 7840 - 467 - 5626

Ex Output:
522


Ex Input:
210 - 9213 + 7659 + 1342 - 8456 - 4862 + 225

Ex Output:

13515