delete pics to save space

7.2411.cpp

@@ -0,0 +1,35 @@
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+int n,m;
+long long f[12][1<<11];
+bool in_s[1<<11];
+int main()
+{
+	#ifdef local
+	freopen("pro.in","r",stdin);
+	#endif
+	while(scanf("%d%d",&n,&m)==2&&n)
+	{
+		for(int i=0;i<(1<<m);i++)
+		{
+			bool cnt=0,ho=0;
+			for(int j=0;j<m;j++)
+				if(i>>j&1) ho|=cnt,cnt=0;
+				else cnt^=1;
+			in_s[i]=ho|cnt?0:1;
+		}
+		f[0][0]=1;
+		for(int i=1;i<=n;i++)
+			for(int j=0;j<(1<<m);j++)
+			{
+				f[i][j]=0;
+				for(int k=0;k<(1<<m);k++)
+					if((j&k)==0&&in_s[j|k])
+						f[i][j]+=f[i-1][k];
+			}
+		printf("%lld\n",f[n][0]);
+	}
+	return 0;
+}