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:
2862 - 964 + 1644

Ex Output:
2182


Ex Input:
8098 - 4341 - 9976 - 6863 - 3608 - 5905

Ex Output:

38791