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: 1420 - 1910 - 3500 + 9535 + 3807 - 5009 - 1271 - 3426

Output: 3194


Input: Consider Input: 4287 + 3355 + 4251 + 7433 + 7069

Output: -17821


Input: Consider Input: 5898 - 6923 - 8111 + 3160 - 6495 - 6893 - 5083 + 9978


Output: 26265