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:
2297 + 4208 + 9691 - 6995 + 738 + 1245 - 7806

Ex Output:
1216

Ex Input:
6667 - 31 + 1584 - 1542 - 6475 + 9319 + 2509 - 1895

Ex Output:
3198

Ex Input:
799 + 5284 - 4298 + 4083 - 5011

Ex Output:
741