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beyondyyh
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Leetcode
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master
Breadcrumbs
Leetcode
/
algorithms
/
tree
/
1367.isSubPath.go
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33 lines (27 loc) · 976 Bytes
master
Breadcrumbs
Leetcode
/
algorithms
/
tree
/
1367.isSubPath.go
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33 lines (27 loc) · 976 Bytes
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package
tree
// 判断一��树是否存在链表的路径
func
isSubPath
(
head
*
ListNode
,
root
*
TreeNode
)
bool
{
if
root
==
nil
{
return
false
}
// 先判断当前的节点,如果不对,再看左右子树
return
isMatch
(
head
,
root
)
||
isSubPath
(
head
,
root
.
Left
)
||
isSubPath
(
head
,
root
.
Right
)
}
// 判断二叉树中的每个节点为起点往下的路径是否与链表相匹配
// head表示当前已经匹配到的链表节点,root表示二叉树的节点
func
isMatch
(
head
*
ListNode
,
root
*
TreeNode
)
bool
{
// 特判1:链表走完了,返回true
if
head
==
nil
{
return
true
}
// 特判2:链表没走完,树走完了,这肯定不行啊,返回false
if
root
==
nil
{
return
false
}
// 特判3:值不同,必定不是啊
if
head
.
Val
!=
root
.
Val
{
return
false
}
// 正常逻辑:如果值相同,继续走,左子树和右子树有一个满足即可
return
isMatch
(
head
.
Next
,
root
.
Left
)
||
isMatch
(
head
.
Next
,
root
.
Right
)
}
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