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:
2673 - 123 - 5121 + 7601 + 976 + 4369 - 4232

Ex Output:
-797

Ex Input:
3677 + 3282 + 6324 + 6039 + 2578 - 7896 + 671 + 4192

Ex Output:
-11513

Ex Input:
4368 - 8055 + 1962 - 9417 + 1902 - 3356 + 5662 + 7377

Ex Output:
8293