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.

Example Input: 6800 + 2564 + 8444 + 1912
Example Output: -6120

Example Input: 7744 - 1859 - 3667 + 1907 - 2807
Example Output: 14170

Example Input: 2296 - 4729 - 7781 - 2633 - 6211 + 849
Example Output:
22801