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.

Example Input: 4224 + 9155 + 116 - 5148 - 7166 - 7397 - 3883 - 2139
Example Output: 20686

Example Input: 7371 - 9025 + 8352 - 9201 - 9297 - 3561 + 8576
Example Output: 21527

Example Input: 3732 + 4965 - 3939 + 3118 - 1932 - 931
Example Output:
2451