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20 lines
326 B

package correct
type TreeNodeM struct {
Left *TreeNodeM
Val int
Right *TreeNodeM
}
func MergeTrees(t1 *TreeNodeM, t2 *TreeNodeM) *TreeNodeM {
if t1 == nil {
return t2
}
if t2 == nil {
return t1
}
t1.Val += t2.Val
t1.Left = MergeTrees(t1.Left, t2.Left)
t1.Right = MergeTrees(t1.Right, t2.Right)
return t1
}