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: 6820 - 387 + 8290 - 9203 - 9292 + 9249 - 3079

Output: 11242


Input: Consider Input: 7208 + 2074 + 2796 - 8783

Output: 11121


Input: Consider Input: 158 - 3031 - 8943 + 7657 - 2929 - 4136 + 691 + 2988 - 9418


Output: 17279