Prototypes analyze（二叉排序树，不同树形个数）

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描述

ALpha Ceiling Manufacturers (ACM) is analyzing the properties of its new series of Incredibly Collapse-Proof Ceilings (ICPCs). An ICPC consists of n layers of material, each with a different value of collapse resistance (measured as a positive integer). The analysis ACM wants to run will take the collapse-resistance values of the layers, store them in a binary search tree, and check whether the shape of this tree in any way correlates with the quality of the whole construction. Because, well, why should it not? To be precise, ACM takes the collapse-resistance values for the layers, ordered from the top layer to the bottom layer, and inserts them one-by-one into a tree. The rules for inserting a value v are: • If the tree is empty, make v the root of the tree. • If the tree is not empty, compare v with the root of the tree. If v is smaller, insert v into the left subtree of the root, otherwise insert v into the right subtree. ACM has a set of ceiling prototypes it wants to analyze by trying to collapse them. It wants to take each group of ceiling prototypes that have trees of the same shape and analyze them together. For example , assume ACM is considering five ceiling prototypes with three layers each, as described by Sample Input 1 and shown in Figure C.1. Notice that the first prototype’s top layer has collapseresistance value 2, the middle layer has value 7, and the bottom layer has value 1. The second prototype has layers with collapse-resistance values of 3, 1, and 4 – and yet these two prototypes induce the same tree shape, so ACM will analyze them together. Given a set of prototypes, your task is to determine how many different tree shapes they induce.

 

输入

The first line of the input contains one integers T, which is the nember of test cases (1<=T<=8). Each test case specifies: * Line 1: two integers n (1 ≤ n ≤ 50), which is the number of ceiling prototypes to analyze, and k (1 ≤ k ≤ 20), which is the number of layers in each of the prototypes. *The next n lines describe the ceiling prototypes. Each of these lines contains k distinct integers ( between 1 and 106 , inclusive ) , which are the collapse-resistance values of the layers in a ceiling prototype, ordered from top to bottom.

输出

For each test case generate a single line containing a single integer that is the number of different tree shapes.

样例输入

1
5 3
2 7 1
1 5 9
3 1 4
2 6 5
9 7 3

样例输出

4

来源

河南省第九届省赛

题解：其实也挺水的，赛场上一直用的深度左右树来存的数形，其实只要把树存起来不就好了。。。当时脑子抽住了。。。

代码：

#include<iostream>
#include<cstdio>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<stack>
using namespace std;

typedef struct Node{
    Node *l, *r;
    int v;
}Node, *Tree;

void build(Tree &p, int v){
    if(p == NULL){
        p = new Node();
        p->v = v;
        p->l = p->r = NULL;
        return ;
    }
    if(v < p->v){
        build(p->l, v);
    }
    else if(v > p->v){
        build(p->r, v);
    }
}
Tree tree[55];
void visit(Tree p){
    
    if(p->l){
        visit(p->l);
    }
    if(p->r){
        visit(p->r);
    }
}
bool jud;
bool judge(Tree a, Tree b){
    if(a == NULL && b == NULL)return true;
    else if(a && b){
        judge(a->l, b->l);
        judge(a->r, b->r);
    }
    else
        jud = false;
}
int main(){
    int T, n, k;
    scanf("%d", &T);
    string s[55];
    while(T--){
        int v;
        scanf("%d%d", &n, &k);
        for(int i = 0; i < n; i++){
            Tree p = NULL;
            for(int j = 0; j < k; j++){
                scanf("%d", &v);
                build(p, v);
            }
            tree[i] = p;
        }
        int ans = 0;
        for(int i = 0; i < n; i++){
            int flot = 1;
            for(int j = i + 1; j < n; j++){
                jud = true;
                judge(tree[i], tree[j]);
                if(jud){
                    flot = 0;
                    break;
                }
            }
            ans += flot;
        }
        printf("%d\n", ans);
    }
    return 0;
}

 

Prototypes analyze（二叉排序树，不同树形个数）

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原文地址：http://www.cnblogs.com/handsomecui/p/5588942.html