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.

Input: Consider Input: 2514 - 3539 - 8491 + 7351 - 1448

Output: 8641


Input: Consider Input: 2480 - 8716 + 5571 - 504 - 4905 - 392 - 5105 + 906

Output: 15625


Input: Consider Input: 3909 - 9359 + 8509 - 673


Output: 5432