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: 3438 - 3865 - 956 - 3020 + 2696
Example Output: 8583

Example Input: 8085 + 9109 - 9653
Example Output: 8629

Example Input: 3136 - 7472 - 2476 + 4818
Example Output:
8266