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krahets
2024-04-11 01:11:20 +08:00
parent a6adc8e20a
commit 739f8a31bb
85 changed files with 1555 additions and 979 deletions
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12
docs/chapter_backtracking/backtracking_algorithm.md
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@ -208,7 +208,7 @@ comments: true
if (root == null) {
return
}
if (root.value == 7) {
if (root._val == 7) {
// 记录解
res!!.add(root)
}
@ -508,7 +508,7 @@ comments: true
}
// 尝试
path!!.add(root)
if (root.value == 7) {
if (root._val == 7) {
// 记录解
res!!.add(path!!.toMutableList())
}
@ -847,12 +847,12 @@ comments: true
/* 前序遍历：例题三 */
fun preOrder(root: TreeNode?) {
// 剪枝
if (root == null || root.value == 3) {
if (root == null || root._val == 3) {
return
}
// 尝试
path!!.add(root)
if (root.value == 7) {
if (root._val == 7) {
// 记录解
res!!.add(path!!.toMutableList())
}
@ -1791,7 +1791,7 @@ comments: true
```kotlin title="preorder_traversal_iii_template.kt"
/* 判断当前状态是否为解 */
fun isSolution(state: MutableList<TreeNode?>): Boolean {
return state.isNotEmpty() && state[state.size - 1]?.value == 7
return state.isNotEmpty() && state[state.size - 1]?._val == 7
}
/* 记录解 */
@ -1801,7 +1801,7 @@ comments: true
/* 判断在当前状态下，该选择是否合法 */
fun isValid(state: MutableList<TreeNode?>?, choice: TreeNode?): Boolean {
return choice != null && choice.value != 3
return choice != null && choice._val != 3
}
/* 更新状态 */