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hello-algo/codes/go/chapter_backtracking/preorder_traversal_test.go

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// File: preorder_traversal_i_compact_test.go
// Created Time: 2023-05-09
// Author: Reanon (793584285@qq.com)
package chapter_backtracking
import (
"fmt"
"testing"
. "github.com/krahets/hello-algo/pkg"
)
func TestPreorderTraversalICompact(t *testing.T) {
/* 初始化二叉树 */
root := ArrToTree([]any{1, 7, 3, 4, 5, 6, 7})
fmt.Println("\n初始化二叉树")
PrintTree(root)
// 前序遍历
res := make([]*TreeNode, 0)
preOrderI(root, &res)
fmt.Println("\n输出所有值为 7 的节点")
for _, node := range res {
fmt.Printf("%v ", node.Val)
}
fmt.Println()
}
func TestPreorderTraversalIICompact(t *testing.T) {
/* 初始化二叉树 */
root := ArrToTree([]any{1, 7, 3, 4, 5, 6, 7})
fmt.Println("\n初始化二叉树")
PrintTree(root)
// 前序遍历
path := make([]*TreeNode, 0)
res := make([][]*TreeNode, 0)
preOrderII(root, &res, &path)
fmt.Println("\n输出所有根节点到节点 7 的路径")
for _, path := range res {
for _, node := range path {
fmt.Printf("%v ", node.Val)
}
fmt.Println()
}
}
func TestPreorderTraversalIIICompact(t *testing.T) {
/* 初始化二叉树 */
root := ArrToTree([]any{1, 7, 3, 4, 5, 6, 7})
fmt.Println("\n初始化二叉树")
PrintTree(root)
// 前序遍历
path := make([]*TreeNode, 0)
res := make([][]*TreeNode, 0)
preOrderIII(root, &res, &path)
fmt.Println("\n输出所有根节点到节点 7 的路径,且路径中不包含值为 3 的节点")
for _, path := range res {
for _, node := range path {
fmt.Printf("%v ", node.Val)
}
fmt.Println()
}
}
func TestPreorderTraversalIIITemplate(t *testing.T) {
/* 初始化二叉树 */
root := ArrToTree([]any{1, 7, 3, 4, 5, 6, 7})
fmt.Println("\n初始化二叉树")
PrintTree(root)
// 回溯算法
res := make([][]*TreeNode, 0)
state := make([]*TreeNode, 0)
choices := make([]*TreeNode, 0)
choices = append(choices, root)
backtrackIII(&state, &choices, &res)
fmt.Println("\n输出所有根节点到节点 7 的路径,且路径中不包含值为 3 的节点")
for _, path := range res {
for _, node := range path {
fmt.Printf("%v ", node.Val)
}
fmt.Println()
}
}