SenseTime Ace Coder Challenge 暨 商汤在线编程挑战赛* B. 我觉得海星

res[i][j]：i->{x1,x2,x3...}->j 的集合的异或值

c[i][j]：i->{x1,x2,x3...}->j 的集合中元素个数

flag[i][j][k]：k点是否在i->{x1,x2,x3...}->j 的集合中

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<string>
#include<algorithm>
#include<iostream>
#include<queue>
#include<map>
#include<cmath>
#include<set>
#include<stack>
#define ll long long
#define pb push_back
#define max(x,y) ((x)>(y)?(x):(y))
#define min(x,y) ((x)>(y)?(y):(x))
#define cls(name,x) memset(name,x,sizeof(name))
#define fs first
#define sc second
#define mp make_pair
#define L(x) (1<<x)
#define next Next
#define index Index
using namespace std;
const int inf=1e9+10;
const ll llinf=1e17+10;
const int maxn=2e2+10;
const int maxm=1e6+10;
const int maxk=1e5+10;
const int mod=1e9+7;
int n;
char mapp[maxn][maxn];
int res[maxn][maxn];
int c[maxn][maxn];
bool flag[maxn][maxn][maxn];
int ans;
int main()
{
    //freopen("in.txt","r",stdin);
    int T,cas=1;
    scanf("%d",&T);
    while (T--)
    {
        ans=0;
        scanf("%d",&n);
        cls(c,0);
        cls(flag,0);
        cls(res,0);
        for(int i=0;i<n;i++)
            scanf("%s",mapp[i]);
        for(int i=1;i<=n;i++)
            for(int j=1;j<=n;j++)
                for(int k=1;k<=n;k++)
                if(i!=j&&i!=k&&j!=k&&mapp[i-1][k-1]=='1'&&mapp[j-1][k-1]=='1')
                {
                    flag[i][j][k]=1;
                    res[i][j]^=k;
                    c[i][j]++;
                }
        for(int i=1;i<=n;i++)
            for(int k1=1;k1<=n;k1++)
                for(int k2=1;k2<=n;k2++)
                {
                    if(i==k1||i==k2||k1==k2) continue;
                    if(mapp[k1-1][k2-1]!='1') continue;

                    int realres1=res[i][k1],realres2=res[i][k2];
                    int realc1=c[i][k1],realc2=c[i][k2];
                    if(flag[i][k1][k2])
                    {
                        realc1--;
                        realres1^=k2;
                    }
                    if(flag[i][k2][k1])
                    {
                        realc2--;
                        realres2^=k1;
                    }
                    if(realc1>0&&realc2>0)
                    {
                        if(realc1>=2||realc2>=2)
                            ans=1;
                        if(realc1==1&&realc2==1&&(realres1^realres2)!=0)
                            ans=1;
                    }
                }
        printf("Case #%d: %s\n",cas++,ans?"Starfish!":"Walk Walk");
    }
    return 0;
}