delete pics to save space

2.129.cpp

@@ -0,0 +1,44 @@
+#include<cstdio>
+int n,L,cnt;
+char res[100000];
+bool dfs(int pos)
+{
+	if(++cnt==n)
+	{
+		for(int i=0;i<pos;i++)
+		{
+			if(i&&!(i&63)) putchar('\n');
+			else if(i&&!(i&3)) putchar(' ');
+			putchar(res[i]);
+		}
+		printf("\n%d\n",pos);
+		return 1;
+	}
+	int j,k;
+	for(char i='A';i<'A'+L;i++)
+	{
+		res[pos]=i;
+		bool ok=1;
+		for(j=1;j*2<=pos+1;j++)
+		{
+			bool equal=1;
+			for(k=0;k<j;k++)
+				if(res[pos-k]!=res[pos-k-j]){equal=0;break;}
+			if(equal){ok=0;break;}
+		}
+		if(ok) if(dfs(pos+1)) return 1;
+	}
+	return 0;
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%d%d",&n,&L)==2&&n&&L)
+	{
+		cnt=-1;
+		dfs(0);
+	}
+	return 0;
+}