From e844602a1e8a23ac0000288eba3e05f4ac3c9552 Mon Sep 17 00:00:00 2001
From: Kirito <1362050620@qq.com>
Date: Mon, 11 Apr 2016 11:01:08 +0800
Subject: [PATCH] Create 1234.cpp

---
 NYOJ/1234.cpp | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 NYOJ/1234.cpp

diff --git a/NYOJ/1234.cpp b/NYOJ/1234.cpp
new file mode 100644
index 0000000..611f2af
--- /dev/null
+++ b/NYOJ/1234.cpp
@@ -0,0 +1,47 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <cmath>
+using namespace std;
+
+int main()
+{
+    int n,R,r;
+    while(scanf("%d %d %d",&n,&R,&r)==3)
+    {
+        if(n==1)
+        {
+            if(R<r)
+            {
+                printf("NO\n");
+            }
+            else
+            {
+                printf("YES\n");
+            }
+            continue;
+        }
+        if(n==2)
+        {
+            if(R<2*r)
+            {
+                printf("NO\n");
+            }
+            else
+            {
+                printf("YES\n");
+            }
+            continue;
+        }
+        int maxN=1/(asin((double)r/(R-r))/3.1415927);
+        if(n<=maxN)
+        {
+            printf("YES\n");
+        }
+        else
+        {
+            printf("NO\n");
+        }
+    }
+    return 0;
+}