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:
1592 + 7031 - 1902 + 5922 - 1351 + 8340 - 2032

Ex Output:
-14416


Ex Input:
4515 - 2156 - 8427 - 2175

Ex Output:
17273


Ex Input:
2757 - 9391 - 1996 - 3110 - 4454

Ex Output:

21708


