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: 7053 - 797 + 1011 - 43 - 2798 - 1572 - 4498
Example Output: 15750

Example Input: 1616 - 440 + 11
Example Output: 2045

Example Input: 2157 - 1326 + 4280 - 2887 - 5998 + 571 + 649
Example Output:
6868