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:
1953 - 3854 - 1362 + 6267 - 3664 - 901 + 7969 + 111

Ex Output:
-2613


Ex Input:
4110 - 9440 + 557 + 7868 - 6315 + 2518 - 9049 + 3905 + 2052

Ex Output:
12014


Ex Input:
2939 - 3767 - 5026 + 2172 + 7443 + 72 + 3980 - 9654 - 6958

Ex Output:

14677