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.

Ex Input:
6681 - 1947 - 955 + 9470 - 4512 - 9603 + 5822 + 9404 - 8896

Ex Output:
7898


Ex Input:
7270 + 4138 - 1696 - 5719 - 9735 + 2360

Ex Output:
17922


Ex Input:
541 - 3060 + 3289 - 8574 + 527 + 5302

Ex Output:

3057