add_executable(preorder_traversal_i_compact preorder_traversal_i_compact.cpp)
add_executable(preorder_traversal_ii_compact preorder_traversal_ii_compact.cpp)
add_executable(preorder_traversal_iii_compact preorder_traversal_iii_compact.cpp)
add_executable(preorder_traversal_iii_template preorder_traversal_iii_template.cpp)
add_executable(permutations_i permutations_i.cpp)
add_executable(permutations_ii permutations_ii.cpp)
add_executable(n_queens n_queens.cpp)
add_executable(subset_sum_i_naive subset_sum_i_naive.cpp)
add_executable(subset_sum_i subset_sum_i.cpp)
add_executable(subset_sum_ii subset_sum_ii.cpp)