delete pics to save space

7.2044.cpp

@@ -0,0 +1,83 @@
+#include<cstdio>
+#include<cstring>
+#include<queue>
+#include<algorithm>
+using namespace std;
+const int dr[]={-1,1,0,0,-2,2,0,0,0};
+const int dc[]={0,0,-1,1,0,0,-2,2,0};
+int n,fe[366][4][4],can[366][3][3],vis[366][3][3][8][8][8][8];
+inline bool Read()
+{
+	scanf("%d",&n);
+	if(n==0) return false;
+	for(int i=1;i<=n;i++)
+		for(int r=0;r<4;r++) for(int c=0;c<4;c++)
+			scanf("%d",&fe[i][r][c]);
+	return true;
+}
+int DFS(int ti,int r,int c,int x1,int x2,int x3,int x4)
+{
+	if(ti==n) return 1;
+	for(int i=0;i<9;i++)
+	{
+		int nr=r+dr[i],nc=c+dc[i];
+#define A1 ((nr==0&&nc==0)?0:x1+1)
+#define A2 ((nr==0&&nc==2)?0:x2+1)
+#define A3 ((nr==2&&nc==2)?0:x3+1)
+#define A4 ((nr==2&&nc==0)?0:x4+1)
+		if(nr<0||nr>2||nc<0||nc>2||!can[ti+1][nr][nc]||vis[ti+1][nr][nc][A1][A2][A3][A4]) continue;
+		if(A1<=6&&A2<=6&&A3<=6&&A4<=6)
+		{
+			vis[ti+1][nr][nc][A1][A2][A3][A4]=1;
+			if(DFS(ti+1,nr,nc,A1,A2,A3,A4)) return 1;
+		}
+	}
+	return 0;
+}
+void Solve()
+{
+	memset(vis,0,sizeof(vis));
+	for(int i=1;i<=n;i++)
+		for(int r=0;r<3;r++) for(int c=0;c<3;c++)
+			can[i][r][c]=1-(fe[i][r][c]|fe[i][r+1][c]|fe[i][r][c+1]|fe[i][r+1][c+1]);
+	if(n>1) printf("%d\n",DFS(1,1,1,1,1,1,1));
+	else printf("%d\n",can[1][1][1]);
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(Read())
+		Solve();
+	return 0;
+}
+/*
+1
+0
+0
+1
+1
+1
+0
+0
+1
+0
+1
+0
+0
+0
+0
+0
+0
+0
+0
+1
+0
+1
+0
+0
+1
+0
+0
+*/