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Update the codes of backtracking.

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krahets
2023-04-27 02:17:04 +08:00
parent 9c070a028f
commit bc77a81330
12 changed files with 13 additions and 2 deletions
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1
codes/python/chapter_backtracking/permutations_i.py
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@ -25,6 +25,7 @@ def backtrack(
# 尝试：做出选择，更新状态
selected[i] = True
state.append(choice)
# 进行下一轮选择
backtrack(state, choices, selected, res)
# 回退：撤销选择，恢复到之前的状态
selected[i] = False

1
codes/python/chapter_backtracking/permutations_ii.py
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@ -27,6 +27,7 @@ def backtrack(
duplicated.add(choice) # 记录选择过的元素值
selected[i] = True
state.append(choice)
# 进行下一轮选择
backtrack(state, choices, selected, res)
# 回退：撤销选择，恢复到之前的状态
selected[i] = False

1
codes/python/chapter_backtracking/preorder_traversal_iii_template.py
View File

@ -48,6 +48,7 @@ def backtrack(state: list[TreeNode], choices: list[TreeNode], res: list[list[Tre
if is_valid(state, choice):
# 尝试：做出选择，更新状态
make_choice(state, choice)
# 进行下一轮选择
backtrack(state, [choice.left, choice.right], res)
# 回退：撤销选择，恢复到之前的状态
undo_choice(state, choice)