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: 2500 + 3268 - 574 + 5695 - 2143 + 404 - 196

Output: -3954


Input: Consider Input: 2303 + 151 - 7031 + 7349 - 8676 + 9084 + 9773

Output: -8347


Input: Consider Input: 2749 - 7503 - 2665 - 7821 - 9462 - 1968 + 1253 - 4137 - 6619


Output: 41671