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:
5758 + 9179 - 1765 - 4142 - 8736

Ex Output:
11222


Ex Input:
5299 - 8791 + 6861

Ex Output:
7229


Ex Input:
5067 - 2028 + 4215

Ex Output:

2880