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:
8974 + 8978 - 8097

Ex Output:
8093


Ex Input:
7451 + 2964 + 1609 - 9543 - 679 + 381 - 9788 - 8125

Ex Output:
30632


Ex Input:
559 - 9063 + 3082

Ex Output:

6540