def backwards(self, orm):
self.dfs_stk(A[::-1], k, [], target, ret)
dataset/ETHPy150Open arachnys/cabot/cabot/cabotapp/migrations/0011_plugin_data_migration_tests.py/Migration.backwards--crossover with--dataset/ETHPy150Open algorhythms/LintCode/k Sum II.py/Solution.dfs_stk