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.

Input: Consider Input: 1163 - 3809 + 5176 - 2533 + 4885 - 8890 - 506 + 5874

Output: 966


Input: Consider Input: 2909 + 1799 - 984 + 4910 + 3253 - 6846 - 8324 - 9048

Output: 18149


Input: Consider Input: 8536 - 1314 - 8028


Output: 17878