fd

Author: liwentian

airbnb/.gitignore

@@ -0,0 +1 @@
+/build

airbnb/airbnb.iml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id=":airbnb" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/.." external.system.id="GRADLE" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet type="android-gradle" name="Android-Gradle">
+      <configuration>
+        <option name="GRADLE_PROJECT_PATH" value=":airbnb" />
+      </configuration>
+    </facet>
+    <facet type="java-gradle" name="Java-Gradle">
+      <configuration>
+        <option name="BUILD_FOLDER_PATH" value="$MODULE_DIR$/build" />
+        <option name="BUILDABLE" value="true" />
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="false">
+    <output url="file://$MODULE_DIR$/build/classes/main" />
+    <output-test url="file://$MODULE_DIR$/build/classes/test" />
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/resources" type="java-test-resource" />
+      <excludeFolder url="file://$MODULE_DIR$/.gradle" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="solution" exported="" />
+    <orderEntry type="module" module-name="library" exported="" />
+  </component>
+</module>

airbnb/build.gradle

@@ -0,0 +1,9 @@
+apply plugin: 'java'
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile project(path: ':solution')
+}
+
+sourceCompatibility = "1.7"
+targetCompatibility = "1.7"

airbnb/src/main/java/com/example/ContainsDuplicate.java

@@ -0,0 +1,40 @@
+package com.example;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.TreeSet;
+
+/**
+ * Created by liwentian on 2017/10/15.
+ */
+
+public class ContainsDuplicate {
+
+    public boolean containsDuplicate(int[] nums) {
+        HashSet<Integer> set = new HashSet<Integer>();
+        for (int n : nums) {
+            if (!set.add(n)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public boolean containsNearbyAlmostDuplicate(int[] nums, int k, int t) {
+        TreeSet<Long> set = new TreeSet<>();
+        for (int i = 0; i < nums.length; ++i) {
+            long n = nums[i];
+            Long s = set.ceiling(n);
+            if (s != null && s <= n + t) return true;
+
+            Long g = set.floor(n);
+            if (g != null && n <= g + t) return true;
+
+            set.add(n);
+            if (set.size() > k) {
+                set.remove((long) nums[i - k]);
+            }
+        }
+        return false;
+    }
+}

airbnb/src/main/java/com/example/HouseRobber.java

@@ -0,0 +1,27 @@
+package com.example;
+
+/**
+ * Created by liwentian on 2017/10/15.
+ */
+
+public class HouseRobber {
+
+    public int rob(int[] nums) {
+        int[] dp = new int[nums.length + 1];
+        dp[0] = 0;
+        for (int i = 1; i <= nums.length; i++) {
+            dp[i] = Math.max(nums[i - 1] + i > 1 ? dp[i - 2] : 0, dp[i - 1]);
+        }
+        return dp[nums.length];
+    }
+
+    public int rob2(int[] nums) {
+        int prev = 0, cur = 0;
+        for (int i = 0; i < nums.length; i++) {
+            int temp = cur;
+            cur = Math.max(prev + nums[i], cur);
+            prev = temp;
+        }
+        return cur;
+    }
+}

airbnb/src/main/java/com/example/Main.java

@@ -0,0 +1,14 @@
+package com.example;
+
+import com.inuker.solution.ContainsDuplicateIII;
+
+public class Main {
+
+    public static void main(String[] args) {
+        int[] nums = {
+            1, 3, 1
+        };
+        boolean result = new ContainsDuplicateIII().containsNearbyAlmostDuplicate2(nums, 1, 1);
+        System.out.println(result);
+    }
+}

airbnb/src/main/java/com/example/TwoSum.java

@@ -0,0 +1,27 @@
+package com.example;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Created by liwentian on 2017/10/14.
+ */
+
+public class TwoSum {
+
+    public int[] twoSum(int[] nums, int target) {
+        HashMap<Integer, Integer> map = new HashMap<>();
+        for (int i = 0; i < nums.length; i++) {
+            map.put(nums[i], i);
+        }
+        for (int i = 0; i < nums.length; i++) {
+            Integer k = map.get(target - nums[i]);
+            if (k != null && k != i) {
+                return new int[] {i, k};
+            }
+        }
+        return null;
+    }
+}

ebook/array/Array.tex

@@ -20,8 +20,9 @@ \subsubsection{Solution}
 \begin{Code}
 /**
  * 如果符合条件的不止一组呢？则找到一组就从map删除一组
- * @return
+ * 另外要考虑的case如[3,3], 6，即存在相同数的情况
  */
+
 public int[] twoSum(int[] nums, int target) {
     HashMap<Integer, Integer> map = new HashMap<>();
     for (int i = 0; i < nums.length; i++) {

settings.gradle

@@ -1 +1 @@
-include ':app', ':solution', ':google', ':library', ':facebook', ':amazon', ':topics', ':test', ':tools'
+include ':app', ':solution', ':google', ':library', ':facebook', ':amazon', ':topics', ':test', ':tools', ':airbnb'

solution/src/main/java/com/inuker/solution/ContainsDuplicate.java

@@ -1,12 +1,17 @@
 package com.inuker.solution;
 
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Set;
+import java.util.TreeSet;
 
 /**
  * Created by dingjikerbo on 16/12/8.
  */
 
+/**
+ * https://leetcode.com/articles/contains-duplicate/
+ */
 public class ContainsDuplicate {
 
     public boolean containsDuplicate(int[] nums) {