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:
9826 - 5862 + 4973 - 7723 - 8510 + 6631 + 9611 + 1510 + 489

Ex Output:
8707


Ex Input:
5939 - 673 - 8282

Ex Output:
14894


Ex Input:
1804 + 6428 + 6001 + 5150 - 704

Ex Output:

-15071