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Commit42c3434

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add 1152
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‎README.md

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@@ -225,6 +225,7 @@ _If you like this project, please leave me a star._ ★
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|1161|[Maximum Level Sum of a Binary Tree](https://leetcode.com/problems/maximum-level-sum-of-a-binary-tree/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1161.java)||Medium|Graph|
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|1160|[Find Words That Can Be Formed by Characters](https://leetcode.com/problems/find-words-that-can-be-formed-by-characters/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1160.java)||Easy||
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|1154|[Day of the Year](https://leetcode.com/problems/day-of-the-year/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1154.java)||Easy||
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|1152|[Analyze User Website Visit Pattern](https://leetcode.com/problems/analyze-user-website-visit-pattern/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1152.java)||Medium|HashTable, Sort, Array|
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|1150|[Check If a Number Is Majority Element in a Sorted Array](https://leetcode.com/problems/check-if-a-number-is-majority-element-in-a-sorted-array/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1150.java)|[:tv:](https://youtu.be/-t2cdVs9cKk)|Easy||
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|1146|[Snapshot Array](https://leetcode.com/problems/snapshot-array/)|[Javascript](./javascript/_1146.js)|| Easy||
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|1138|[Alphabet Board Path](https://leetcode.com/problems/alphabet-board-path/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1138.java)|| Medium|HashTable, String|
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packagecom.fishercoder.solutions;
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importjava.util.ArrayList;
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importjava.util.HashMap;
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importjava.util.HashSet;
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importjava.util.List;
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importjava.util.Map;
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importjava.util.Set;
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importjava.util.TreeMap;
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publicclass_1152 {
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publicstaticclassSolution1 {
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publicList<String>mostVisitedPattern(String[]username,int[]timestamp,String[]website) {
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Map<String,TreeMap<Integer,String>>userToSiteMap =newHashMap<>();
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for (inti =0;i <username.length;i++) {
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if (!userToSiteMap.containsKey(username[i])) {
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userToSiteMap.put(username[i],newTreeMap<>());
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}
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TreeMap<Integer,String>timeToSiteMap =userToSiteMap.get(username[i]);
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timeToSiteMap.put(timestamp[i],website[i]);
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userToSiteMap.put(username[i],timeToSiteMap);
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}
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Map<String,Integer>sequenceCountMap =newHashMap<>();
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for (Stringuser :userToSiteMap.keySet()) {
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TreeMap<Integer,String>timeToSiteMap =userToSiteMap.get(user);
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if (timeToSiteMap.size() <3) {
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continue;
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}else {
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List<Integer>times =newArrayList<>();
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for (inttime :timeToSiteMap.keySet()) {
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times.add(time);
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}
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List<String>allSequences =formAllSequences(times,timeToSiteMap);
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Set<String>encounteredSequence =newHashSet<>();
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for (Stringsequence :allSequences) {
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if (encounteredSequence.add(sequence)) {
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sequenceCountMap.put(sequence,sequenceCountMap.getOrDefault(sequence,0) +1);
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}
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}
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}
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}
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List<String>mostVisitedPattern =newArrayList<>();
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intcount =0;
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Stringresult =null;
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for (Stringsequence :sequenceCountMap.keySet()) {
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if (sequenceCountMap.get(sequence) >count) {
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result =sequence;
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count =sequenceCountMap.get(sequence);
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}elseif (count ==sequenceCountMap.get(sequence)) {
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if (sequence.compareTo(result) <0) {
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result =sequence;
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}
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}
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}
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for (Stringsite :result.split("->")) {
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mostVisitedPattern.add(site);
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}
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returnmostVisitedPattern;
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}
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privateList<String>formAllSequences(List<Integer>times,TreeMap<Integer,String>timeToSiteMap) {
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List<String>result =newArrayList<>();
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for (inti =0;i <times.size() -2;i++) {
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for (intj =i +1;j <times.size() -1;j++) {
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for (intk =j +1;k <times.size();k++) {
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result.add(timeToSiteMap.get(times.get(i)) +"->" +timeToSiteMap.get(times.get(j)) +"->" +timeToSiteMap.get(times.get(k)));
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}
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}
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}
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returnresult;
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}
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}
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}
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packagecom.fishercoder;
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importcom.fishercoder.solutions._1152;
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importorg.junit.BeforeClass;
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importorg.junit.Test;
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importjava.util.Arrays;
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importstaticorg.junit.Assert.assertEquals;
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publicclass_1152Test {
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privatestatic_1152.Solution1solution1;
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@BeforeClass
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publicstaticvoidsetup() {
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solution1 =new_1152.Solution1();
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}
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@Test
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publicvoidtest1() {
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assertEquals(Arrays.asList("home","about","career"),solution1.mostVisitedPattern(newString[]{"joe","joe","joe","james","james","james","james","mary","mary","mary"},newint[]{1,2,3,4,5,6,7,8,9,10},newString[]{"home","about","career","home","cart","maps","home","home","about","career"}));
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}
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@Test
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publicvoidtest2() {
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assertEquals(Arrays.asList("oz","mryxsjc","wlarkzzqht"),solution1.mostVisitedPattern(newString[]{"zkiikgv","zkiikgv","zkiikgv","zkiikgv"},newint[]{436363475,710406388,386655081,797150921},newString[]{"wnaaxbfhxp","mryxsjc","oz","wlarkzzqht"}));
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}
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@Test
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publicvoidtest3() {
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assertEquals(Arrays.asList("hibympufi","hibympufi","yljmntrclw"),solution1.mostVisitedPattern(newString[]{"h","eiy","cq","h","cq","txldsscx","cq","txldsscx","h","cq","cq"},newint[]{527896567,334462937,517687281,134127993,859112386,159548699,51100299,444082139,926837079,317455832,411747930},newString[]{"hibympufi","hibympufi","hibympufi","hibympufi","hibympufi","hibympufi","hibympufi","hibympufi","yljmntrclw","hibympufi","yljmntrclw"}));
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}
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}

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