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: 5634 - 7997 + 8248 + 1465 - 3986
Example Output: 7904

Example Input: 7591 + 2427 + 6553 + 4047 - 9300 + 2235 + 7278
Example Output: -5649

Example Input: 6051 - 6515 - 4062 + 2530 - 9638 + 2480 + 6518 - 7691 + 3633
Example Output:
18796