【poj2960】 S-Nim

// poj2960
#include<algorithm>
#include<iostream>
#include<cstring>
#include<cstdlib>
#include<cstdio>
#include<cmath>
#include<map>
#define inf 2147483640
#define LL long long
#define free(a) freopen(a".in","r",stdin);freopen(a".out","w",stdout);
using namespace std;
inline LL getint() {
    LL x=0,f=1;char ch=getchar();
    while (ch>‘9‘ || ch<‘0‘) {if (ch==‘-‘) f=-1;ch=getchar();}
    while (ch>=‘0‘ && ch<=‘9‘) {x=x*10+ch-‘0‘;ch=getchar();}
    return x*f;
}

const int maxn=10010;
int k,n,m,sg[maxn],s[maxn];

void calsg(int x) {
    if (sg[x]!=-1) return;
    //map<int,bool> mark;
    bool mark[10010];
    memset(mark,0,sizeof(mark));
    int temp;
    for (int i=1;i<=k;i++) {
        temp=x-s[i];
        if (temp>=0) {
            if (sg[temp]==-1) calsg(temp);
            mark[sg[temp]]=1;
        }
    }
    for (int i=0;;i++) if (!mark[i]) {sg[x]=i;return;}
}
int main() {
    while (scanf("%d",&k)!=EOF && k) {
        for (int i=1;i<=k;i++) scanf("%d",&s[i]);
        sg[0]=0;
        for (int i=1;i<=maxn;i++)
            sg[i]=-1;
        scanf("%d",&m);
        while (m--) {
            scanf("%d",&n);
            int ans=0;
            while (n--) {
                int x;scanf("%d",&x);
                if (sg[x]==-1) calsg(x);
                ans^=sg[x];
            }
            if (ans) printf("W");
            else printf("L");
        }
        printf("\n");
    }
    return 0;
}