text: Keep track of the number of shifts required to place elements at same indices
code: else : NEW_LINE INDENT if i - Aindex [ B [ i ] ] not in diff : NEW_LINE INDENT diff [ i - Aindex [ B [ i ] ] ] = 1 NEW_LINE DEDENT else : NEW_LINE INDENT diff [ i - Aindex [ B [ i ] ] ] += 1 NEW_LINE DEDENT DEDENT