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: 1928 - 8869 + 937 + 6209 + 5391 - 5357 + 6743
Example Output: -3126

Example Input: 6738 - 471 + 8724
Example Output: -1515

Example Input: 8521 - 7325 - 8529
Example Output:
24375