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:
2131 + 4513 + 3760 - 9342 + 7779 + 4653 + 3111

Ex Output:
-12343


Ex Input:
1701 + 3893 - 695 + 2870 + 5011

Ex Output:
-9378


Ex Input:
1404 + 1028 - 3232 - 1500 + 2741

Ex Output:

2367