delete pics to save space

7.1084.cpp

@@ -0,0 +1,86 @@
+#include<cstdio>
+#include<cstring>
+int n,m,maxd,cnt,sum;
+int FullSize[625],Size[625];
+bool sti[65],in[625][65];
+inline int getc(int r,int c)// |
+{
+	return r*(2*n+1)+c+n+1;
+}
+inline int getr(int r,int c)//--
+{
+	return r*(2*n+1)+c+1;
+}
+inline int FindNext()
+{
+	for(int i=1;i<=cnt;i++)
+		if(Size[i]==FullSize[i])
+			return i;
+	return 0;
+}
+void dfs(int d)
+{
+	if(d>=maxd) return;
+	int next=FindNext();
+	if(next==0)
+	{
+		maxd=d;
+		return;
+	}
+	for(int i=1;i<=sum;i++)
+		if(in[next][i])
+		{
+			for(int j=1;j<=cnt;j++)
+				if(in[j][i]) Size[j]--;
+			dfs(d+1);
+			for(int j=1;j<=cnt;j++)
+				if(in[j][i]) Size[j]++;
+		}
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+//	freopen("pro.out","w",stdout);
+#endif
+	int kase;
+	scanf("%d",&kase);
+	while(kase-->0)
+	{
+		memset(in,0,sizeof(in));
+		memset(sti,1,sizeof(sti));
+		cnt=0;
+		scanf("%d%d",&n,&m);
+		int a,b,e,f;
+		for(int i=0;i<m;i++)
+		{
+			scanf("%d",&a);
+			sti[a]=0;
+		}
+		for(int len=1;len<=n;len++)
+			for(int r=0;r+len<=n;r++)
+				for(int c=0;c+len<=n;c++)
+				{
+					cnt++;
+					FullSize[cnt]=len*4;
+					Size[cnt]=0;
+					for(int i=0;i<len;i++)
+					{
+						a=getr(r,c+i);
+						b=getr(r+len,c+i);
+						e=getc(r+i,c);
+						f=getc(r+i,c+len);
+						in[cnt][a]=true;
+						in[cnt][b]=true;
+						in[cnt][e]=true;
+						in[cnt][f]=true;
+						Size[cnt]+=sti[a]+sti[b]+sti[e]+sti[f];
+					}
+				}
+		maxd=n*n;
+		sum=2*n*(n+1);
+		dfs(0);
+		printf("%d\n",maxd);
+	}
+	return 0;
+}