經過這題,我發現原來用vector做參數是會超時的,難怪沒人這樣用來啦……
#include<iostream>
#include<vector>
using namespace std;
struct T
{
int a[4];
};
int n,p[370][20],b[5]={1,4,13,16};
vector<int> v1[15],v2[15];
bool hash[10][370][7][7][7][7];
int dfs(int k,int d,T s)
{
if(d>n)return 1;
int i,j,vis[20];
bool &ret=hash[k][d][s.a[0]][s.a[1]][s.a[2]][s.a[3]];
T ss;
if(ret)return 0;
ret=true;
for(i=0;i<v1[k].size();i++)
if(p[d][v1[k][i]])return 0;
for(i=0;i<4;i++)
if(s.a[i]==7)return 0;
for(i=0;i<v2[k].size();i++)
{
memset(vis,0,sizeof(vis));
for(j=0;j<v1[v2[k][i]].size();j++)vis[v1[v2[k][i]][j]]=1;
ss=s;
for(j=0;j<4;j++)
{
if(vis[b[j]])ss.a[j]=0;
else ss.a[j]++;
}
if(dfs(v2[k][i],d+1,ss))return 1;
}
return 0;
}
int main()
{
//freopen("a.txt","r",stdin);
//freopen("b.txt","w",stdout);
int i,j,l;
T s;
for(i=1;i<10;i++)
{
v1[i].clear();
l=i;
l+=(i-1)/3;
v1[i].push_back(l);
v1[i].push_back(l+1);
v1[i].push_back(l+4);
v1[i].push_back(l+5);
}
for(i=1;i<10;i++)
{
v2[i].clear();
v2[i].push_back(i);
if(i-1>0&&i%3!=1)v2[i].push_back(i-1);
if(i+1<10&&i%3)v2[i].push_back(i+1);
if(i-3>0)v2[i].push_back(i-3);
if(i+3<10)v2[i].push_back(i+3);
if(i-2>0&&i%3==0)v2[i].push_back(i-2);
if(i+2<10&&i%3==1)v2[i].push_back(i+2);
if(i-6>0)v2[i].push_back(i-6);
if(i+6<10)v2[i].push_back(i+6);
}
while(scanf("%d",&n)&&n)
{
for(i=1;i<=n;i++)
for(j=1;j<=16;j++)
scanf("%d",&p[i][j]);
for(i=0;i<4;i++)s.a[i]=1;
memset(hash,false,sizeof(hash));
printf("%d\n",dfs(5,1,s));
}
return 0;
}