hdu 1536 S-Nim (sg函数)

 1/* ***********************************************
 2Author :111qqz
 3Created Time :2016年07月20日 星期三 23时32分48秒
 4File Name :code/hdu/1536.cpp
 5************************************************ */
 6
 7#include <cstdio>
 8#include <cstring>
 9#include <iostream>
10#include <algorithm>
11#include <vector>
12#include <queue>
13#include <set>
14#include <map>
15#include <string>
16#include <cmath>
17#include <cstdlib>
18#include <ctime>
19#define fst first
20#define sec second
21#define lson l,m,rt<<1
22#define rson m+1,r,rt<<1|1
23#define ms(a,x) memset(a,x,sizeof(a))
24typedef long long LL;
25#define pi pair < int ,int >
26#define MP make_pair
27
28using namespace std;
29const double eps = 1E-8;
30const int dx4[4]={1,0,0,-1};
31const int dy4[4]={0,-1,1,0};
32const int inf = 0x3f3f3f3f;
33const int N=1E4+7;
34int  sg[N];
35bool vis[N];
36int ok[N];
37int k,m;
38
39void sg_init()
40{
41    ms(sg,0);
42
43    for ( int i = 1; i < N ; i++)
44    {
45	ms(vis,false);
46	for ( int j = 1 ; j <= k ; j++)
47	    if (i-ok[j]>=0) vis[sg[i-ok[j]]] = true;
48
49	for ( int j = 0 ;  ; j++)
50	    if (!vis[j])
51	    {
52		sg[i] = j;
53		break;
54	    }
55    }
56}
57int main()
58{
59	#ifndef  ONLINE_JUDGE 
60	freopen("code/in.txt","r",stdin);
61  #endif
62
63	while (~scanf("%d",&k))
64	{
65	    if (k==0) break;
66	    ms(ok,0);
67	    for ( int i = 1 ; i <= k ; i++) scanf("%d",&ok[i]);
68	    sg_init();
69	    scanf("%d",&m);
70//	    cout<<"m:"<<m<<endl;
71	    while (m--)
72	    {
73		int num;
74		scanf("%d",&num);
75		int sum = 0 ;
76		while (num--)
77		{
78		    int x;
79		    scanf("%d",&x);
80		    sum^=sg[x];
81		}
82		if (sum==0) printf("L");
83		else printf("W");
84	    }
85	    printf("\n");
86	}
87
88  #ifndef ONLINE_JUDGE  
89  fclose(stdin);
90  #endif
91    return 0;
92}