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:
1616 - 440 + 11

Ex Output:
2045


Ex Input:
2342 + 4498 - 5816 + 2604 - 6155 - 2683 - 1893 - 2482

Ex Output:
14269


Ex Input:
3874 - 5476 + 6530 - 3209 - 8137 - 8936 - 4928 + 4709

Ex Output:

23321