* fix endless loop bug, divide 0 bug and update description
fix an endless bug, for example, if collection = [10,30,40,45,50,66,77,93], item = 67.
fix divide 0 bug, when right=left it is not OK to point = left + ((item - sorted_collection[left]) * (right - left)) // (sorted_collection[right] - sorted_collection[left])
update 'sorted' to 'ascending sorted' in description to avoid confusion
* delete swap files
* delete 'address' and add input validation