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:
3583 - 967 - 3552 + 7898 - 1248 + 6992 - 5291 + 819

Ex Output:
-1068


Ex Input:
1656 - 2355 + 4098 + 8586 + 7634 + 9427 + 9429

Ex Output:
-35163


Ex Input:
3721 + 9415 - 1293 + 5354 - 161 - 9026

Ex Output:

-568