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:
5398 + 4622 - 3983 - 2396 + 2403 - 2514

Ex Output:
7266


Ex Input:
6433 + 6891 + 2386 - 7923 - 2419 + 7641

Ex Output:
-143


Ex Input:
6970 - 9526 - 5385

Ex Output:

21881