delete pics to save space

p.CH3B16.cpp

@@ -0,0 +1,50 @@
+//http://contest-hunter.org:83/contest/0x3B%E3%80%8C%E6%95%B0%E5%AD%A6%E7%9F%A5%E8%AF%86%E3%80%8D%E7%BB%83%E4%B9%A0/3B16%20%E9%AD%94%E6%B3%95%E7%8F%A0
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+const int maxn=1005;
+int n,f[maxn];
+void fj(int n,int *a,int &tot)
+{
+	tot=a[1]=1;
+	for(int i=2;i*i<=n;i++) if(n%i==0)
+	{
+		a[++tot]=i;
+		if(i*i!=n) a[++tot]=n/i;
+	}
+}
+int SG(int x)
+{
+	if(f[x]!=-1) return f[x];
+	int &res=f[x]; res=0;
+	int tot,a[maxn]; bool v[maxn]={0};
+	fj(x,a,tot);
+	for(int i=1;i<=tot;i++)//ȥ<><C8A5>i
+	{
+		int k=0;
+		for(int j=1;j<=tot;j++) if(i!=j) k^=SG(a[j]);
+		v[k]=1;
+	}
+	while(v[res]) res++;
+	return res;
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	memset(f,-1,sizeof(f));
+	f[1]=0;
+	while(scanf("%d",&n)==1)
+	{
+		int res=0;
+		for(int i=1;i<=n;i++)
+		{
+			int x; scanf("%d",&x);
+			res^=SG(x);
+		}
+		printf("%s\n",res?"freda":"rainbow");
+	}
+	return 0;
+}