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:
2510 - 5839 + 9950 + 740

Ex Output:
-2341


Ex Input:
8739 - 8064 - 7000 + 6709

Ex Output:
17094


Ex Input:
9184 + 2079 + 5356 - 9856 + 6059 - 2476 - 9342 + 2796 - 1798

Ex Output:

16366