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1043.cpp
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//
// 1043.cpp
// 算法
//
// Created by 王怡凡 on 2017/8/28.
// Copyright © 2017年 王怡凡. All rights reserved.
//
#include <stdio.h>
#include<vector>
using namespace std;
vector<int> origin, pre,preM,post,postM;
struct node {
int data;
node *left,*right;
};
void insert(node* &root, int data) {
if(root==NULL) {
root = new node;
root->data = data;
root->left = root->right = NULL;
return ;
}
if(data<root->data) {
insert(root->left,data);
} else {
insert(root->right,data);
}
}
void preOrder(node* root, vector<int> &vi) {
if(root==NULL) {
return ;
}
vi.push_back(root->data);
preOrder(root->left,vi);
preOrder(root->right,vi);
}
void preOrderMirror(node* root, vector<int> &vi) {
if(root==NULL) {
return ;
}
vi.push_back(root->data);
preOrderMirror(root->right,vi);
preOrderMirror(root->left,vi);
}
void postOrder(node* root, vector<int> &vi) {
if(root==NULL) {
return ;
}
postOrder(root->left,vi);
postOrder(root->right,vi);
vi.push_back(root->data);
}
void postOrderMirror(node* root, vector<int> &vi) {
if(root==NULL) {
return ;
}
postOrderMirror(root->right,vi);
postOrderMirror(root->left,vi);
vi.push_back(root->data);
}
int main() {
int n,data;
node *root = NULL;
scanf("%d",&n);
int i;
for(i=0;i<n;i++) {
scanf("%d",&data);
origin.push_back(data);
insert(root,data);
}
preOrder(root,pre);
preOrderMirror(root,preM);
postOrder(root,post);
postOrderMirror(root,postM);
if(origin==pre) {
printf("YES\n");
for(i=0;i<post.size();i++) {
printf("%d",post[i]);
if(i!=post.size()-1) {
printf(" ");
}
}
} else if(origin==preM){
printf("YES\n");
for(i=0;i<postM.size();i++) {
printf("%d",postM[i]);
if(i!=postM.size()-1) {
printf(" ");
}
}
} else {
printf("NO\n");
}
return 0;
}