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:
9292 - 7471 - 1025 - 8458 + 444

Ex Output:
25802


Ex Input:
4101 + 2536 - 502

Ex Output:
2067


Ex Input:
2136 - 6031 - 4846 + 5515

Ex Output:

7498