27 lines
396 B
Go
27 lines
396 B
Go
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package main
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type TreeNode struct {
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Val int
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Left *TreeNode
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Right *TreeNode
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}
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func main() {
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}
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func isSymmetric(root *TreeNode) bool {
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return checkifq(root.Left, root.Right)
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}
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func checkifq(a, b *TreeNode) bool {
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if a == nil && b == nil {
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return true
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}
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if a == nil || b == nil {
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return false
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}
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return a.Val == b.Val && checkifq(a.Left, b.Right) && checkifq(a.Right, b.Left)
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}
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