From 2d36c59bbaf6666fb23f6e1aba0c7ee60c3e963c Mon Sep 17 00:00:00 2001
From: Kirito <1362050620@qq.com>
Date: Sat, 17 Sep 2016 22:00:38 +0800
Subject: [PATCH] Create 5881_chen9510.cpp

From http://www.cnblogs.com/chen9510/p/5879710.html
---
 HDOJ/5881_chen9510.cpp | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 HDOJ/5881_chen9510.cpp

diff --git a/HDOJ/5881_chen9510.cpp b/HDOJ/5881_chen9510.cpp
new file mode 100644
index 0000000..6e0f6ef
--- /dev/null
+++ b/HDOJ/5881_chen9510.cpp
@@ -0,0 +1,37 @@
+#include <iostream>
+#include <algorithm>
+#include <stdio.h>
+#include <queue>
+#include <cmath>
+#include <string.h>
+using namespace std;
+
+int main()
+{
+    long long L,R;
+    while(scanf("%lld%lld",&L,&R)!=EOF)
+    {
+        if(L==R)
+        {
+            if(R<=1) puts("0");
+            else if(R==2) puts("1");
+            else puts("2");
+            continue;
+        }
+        if(L==0)
+        {
+            if(R==1) puts("0");
+            else if(R==2) puts("1");
+            else printf("%lld\n",(R+1)/2);
+        }
+        else
+        {
+            if(L==1&&R==2)  puts("1");
+            else{
+            if(L+2>=R-1) puts("2");
+            else printf("%lld\n",(R-L+2)/2);
+            }
+        }
+    }
+    return 0;
+}