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bus710.go
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69 lines (60 loc) · 1021 Bytes
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package hello
type TreeNode struct {
Val int
Left *TreeNode
Right *TreeNode
}
func isSameTree(p, q *TreeNode) bool {
if p == nil && q == nil {
return true
}
return checker(p, q)
}
func checker(p, q *TreeNode) bool {
if eitherNilChecker(p, q) {
return false
}
if p.Val != q.Val {
return false
}
if !bothNilChecker(p.Left, q.Left) {
re := checker(p.Left, q.Left)
if !re {
return false
}
}
if !bothNilChecker(p.Right, q.Right) {
re := checker(p.Right, q.Right)
if !re {
return false
}
}
return true
}
func eitherNilChecker(p, q *TreeNode) bool {
if p == nil && q != nil {
return true
}
if p != nil && q == nil {
return true
}
if p.Left != nil && q.Left == nil {
return true
}
if p.Left == nil && q.Left != nil {
return true
}
if p.Right != nil && q.Right == nil {
return true
}
if p.Right == nil && q.Right != nil {
return true
}
return false
}
func bothNilChecker(p, q *TreeNode) bool {
if p == nil && q == nil {
return true
}
return false
}