S-Nim

http://acm.hdu.edu.cn/showproblem.php?pid=1536

SG经典题，不多说

// File Name: hdu1536.cpp
// Author: bo_jwolf
// Created Time: 2013年09月30日 星期一 18:23:53

#include<vector>
#include<list>
#include<map>
#include<set>
#include<deque>
#include<stack>
#include<bitset>
#include<algorithm>
#include<functional>
#include<numeric>
#include<utility>
#include<sstream>
#include<iostream>
#include<iomanip>
#include<cstdio>
#include<cmath>
#include<cstdlib>
#include<cstring>
#include<ctime>

using namespace std;

const int N = 105 ;
const int MAXN = 10100;
bool vis[MAXN];
int sg[MAXN];
int si[ MAXN ] , n ;
int Getsg( int N )
{//printf( " n = %dn",n );
    int hash[105] = {0};
    for( int i = 0; i < n && si[i] <= N; ++i )
    {
         if( sg[N-si[i]] == -1 )
             sg[N-si[i]] = Getsg( N - si[i] );
         hash[sg[N-si[i]]] = 1;
     }
     for( int i = 0; ; i++ )
          if( !hash[i] )
              return i;
}

int main(){
    int temp , ans , m  ; 
    while( scanf( "%d" , &n ) != EOF && n ){
        for( int i = 0 ; i < n ; ++i ){
            scanf( "%d" , &si[ i ] ) ;
        }
        memset( sg , -1 , sizeof( sg ) ) ;
        sort( si , si + n ) ;
        int Case ;
        scanf( "%d" , &Case ) ;
        while( Case-- ){
            scanf( "%d" , &m ) ;
            ans = 0;
            for( int i = 0 ; i < m ; ++i ){
                scanf( "%d" , &temp ) ;
                ans ^= Getsg( temp ) ;
            }
            if( ans ==  0 ) cout << "L"  ;
            else cout << "W"  ;
        }
        cout << endl ;
    }
return 0;
}