zoukankan      html  css  js  c++  java
  • A Chess Game POJ

    Let's design a new chess game. There are N positions to hold M chesses in this game. Multiple chesses can be located in the same position. The positions are constituted as a topological graph, i.e. there are directed edges connecting some positions, and no cycle exists. Two players you and I move chesses alternately. In each turn the player should move only one chess from the current position to one of its out-positions along an edge. The game does not end, until one of the players cannot move chess any more. If you cannot move any chess in your turn, you lose. Otherwise, if the misfortune falls on me... I will disturb the chesses and play it again. 

    Do you want to challenge me? Just write your program to show your qualification!

    Input

    Input contains multiple test cases. Each test case starts with a number N (1 <= N <= 1000) in one line. Then the following N lines describe the out-positions of each position. Each line starts with an integer Xi that is the number of out-positions for the position i. Then Xi integers following specify the out-positions. Positions are indexed from 0 to N-1. Then multiple queries follow. Each query occupies only one line. The line starts with a number M (1 <= M <= 10), and then come M integers, which are the initial positions of chesses. A line with number 0 ends the test case.

    Output

    There is one line for each query, which contains a string "WIN" or "LOSE". "WIN" means that the player taking the first turn can win the game according to a clever strategy; otherwise "LOSE" should be printed.

    Sample Input

    4
    2 1 2
    0
    1 3
    0
    1 0
    2 0 2
    0
    
    4
    1 1
    1 2
    0
    0
    2 0 1
    2 1 1
    3 0 1 3
    0
    

    Sample Output

    WIN
    WIN
    WIN
    LOSE
    WIN
    

    思路:树上nim,叶子节点nim为0,父亲节点递归儿子得到sg值,答案就是每个石子所在点的sg值异或和。

    #include <iostream>
    #include <cstdio>
    #include <string.h>
    using namespace std;
    int mp[1001][1001];
    int SG[1001];
    int N;
     int DFS(int n)
    {
        int i;
        if(SG[n]!=-1)
            return SG[n];
        bool next[1001];
        memset(next, 0, sizeof(next));
        for(i = 0; i < N; ++i)
        {
            if(mp[n][i] != -1)
                next[DFS(i)] = 1;
        }
        i = 0;
        while(next[i])
            i++;
        return SG[n] = i;
    }
    int main()
    {
        int i, j, k, t;
        int X;
        int tp, ans;
        while(scanf("%d", &N)!=EOF)
        {
            memset(mp, -1, sizeof(mp));
            memset(SG, -1, sizeof(SG));
            for(i = 0; i < N; ++i)
            {
                scanf("%d", &k);
                if(k==0) SG[i] = 0;
                for(j =0 ; j < k; ++j)
                {
                    scanf("%d", &t);
                    mp[i][t] = 1;
                }
            }
            while(scanf("%d", &X))
            {
                if(X==0) break;
                ans = 0;
                for(i = 0; i < X; ++i)
                {
                    scanf("%d", &tp);
                    ans = ans ^ DFS(tp);
                }
                if(ans) printf("WIN
    ");
                else printf("LOSE
    ");
            }
        }
        return 0;
    }
    View Code

    转载

  • 相关阅读:
    Python基础笔记
    Oracle PL/SQL学习之Hello World(0)
    编程开发之--Oracle数据库--存储过程在out参数中使用光标(3)
    编程开发之--Oracle数据库--存储过程和存储函数(2)
    编程开发之--Oracle数据库--存储过程和存储函数(1)
    火车票售票系统
    MySQL 字段内容区分大小写
    json_encode($b, JSON_FORCE_OBJECT) 可以强制转换成对象
    Sublime Text3配置
    springboot-配置多个数据源
  • 原文地址:https://www.cnblogs.com/astonc/p/10034394.html
Copyright © 2011-2022 走看看