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: 7371 - 9025 + 8352 - 9201 - 9297 - 3561 + 8576
Example Output: 21527

Example Input: 3477 + 8970 + 2278 - 9906 - 106 - 208 - 1334
Example Output: 3783

Example Input: 2507 - 718 - 5872 + 1591 - 2304 + 7021
Example Output:
2789