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: 1971 - 5591 + 4038 + 5571
Example Output: -2047

Example Input: 5162 - 4324 - 8160 + 9296 - 1881
Example Output: 10231

Example Input: 8821 + 1249 - 8664 - 6821
Example Output:
23057