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: 8354 + 2602 + 1315
Example Output: 4437

Example Input: 5986 + 9293 + 3288 - 1791 + 6613 + 8185 - 7053
Example Output: -12549

Example Input: 3417 + 2279 + 74
Example Output:
1064