From 644ab5e204fb934f301dedc599459b21ea2c2354 Mon Sep 17 00:00:00 2001
From: Aidan WU <wumuyang1018@gmail.com>
Date: Mon, 7 Oct 2013 17:30:26 -0400
Subject: [PATCH] Update 9.3.cpp

---
 9.3.cpp | 45 +++++++++++++++++++++++++++------------------
 1 file changed, 27 insertions(+), 18 deletions(-)

diff --git a/9.3.cpp b/9.3.cpp
index 5cf11b3..efffc10 100644
--- a/9.3.cpp
+++ b/9.3.cpp
@@ -2,32 +2,39 @@
 using namespace std;
 
 int search(int a[], int low, int high, int x){
-    while(low <= high){
+    //while(low <= high){
         //cout<<low<<" "<<high<<endl;
         //++cnt;
-        int mid = (low+high)>>1;
-        if(a[mid] == x) return mid;
-        if(a[mid] < x){
-            if(a[mid] < a[low]){
-                if(a[low] <= x) high = mid - 1;
-                else low = mid + 1;
-            }
-            else{
-                low = mid + 1;
-            }
+    int mid = (low+high) / 2;
+    if(a[mid] == x) return mid;
+    if(high < low) return -1;
+    if(a[mid] > a[low]){
+        if(x >= a[low] && x <= a[mid]){
+            return search(a, low, mid - 1, x);
+        } else{
+            return search(a, mid + 1, high, x);
         }
-        else{
-            if(a[mid] < a[low]){
-                high = mid - 1;
-            }
-            else{
-                if(a[low] <= x) high = mid - 1;
-                else low = mid + 1;
+    } else if(a[mid] < a[low]){
+        if(x >= a[mid] && x <= a[high]){
+            return search(a, mid + 1, high, x);
+        } else{
+            return search(a, low, mid - 1, x);
+        }
+    } else if(a[low] == a[mid]){
+        if(a[mid] != a[high]){
+            return search(a, mid + 1, high, x);
+        } else{
+            int result = search(a, low, mid - 1, x);
+            if(result == -1){
+                return search(a, mid + 1, high, x);
+            } else{
+                return result;
             }
         }
     }
     return -1;
 }
+
 int main(){
     int a[12] = {
         15, 16, 19, 20, 25, 1, 3, 4, 5, 7, 10, 14
@@ -36,5 +43,7 @@ int main(){
         2,2,2,2,2,2,2,2,3,2,2,2,2,2,2,2,2,2,2
     };
     cout<<search(a, 0, 11, 3)<<endl;
+    cout<<search(b, 0, 18, 3)<<endl;
+
     return 0;
 }