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Commit65d9ce8

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‎README.md

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@@ -373,6 +373,7 @@ _If you like this project, please leave me a star._ ★
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|1261|[Find Elements in a Contaminated Binary Tree](https://leetcode.com/problems/find-elements-in-a-contaminated-binary-tree/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1261.java)||Medium|Tree, HashTable|
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|1260|[Shift 2D Grid](https://leetcode.com/problems/shift-2d-grid/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1260.java)|[:tv:](https://www.youtube.com/watch?v=9hBcARSiU0s)|Easy||
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|1258|[Synonymous Sentences](https://leetcode.com/problems/synonymous-sentences/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1258.java)||Medium|Backtracking|
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|1257|[Smallest Common Region](https://leetcode.com/problems/smallest-common-region/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1257.java)||Medium|Tree, HashTable, DFS, BFS|
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|1252|[Cells with Odd Values in a Matrix](https://leetcode.com/problems/cells-with-odd-values-in-a-matrix/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1252.java)||Easy||
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|1249|[Minimum Remove to Make Valid Parentheses](https://leetcode.com/problems/minimum-remove-to-make-valid-parentheses/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1249.java)||Medium|String, Stack|
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|1243|[Array Transformation](https://leetcode.com/problems/array-transformation/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1243.java)|[:tv:](https://www.youtube.com/watch?v=MQ2i4T1l-Gs)|Easy||
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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.List;
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importjava.util.Map;
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publicclass_1257 {
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publicstaticclassSolution1 {
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publicStringfindSmallestRegion(List<List<String>>regions,Stringregion1,Stringregion2) {
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Map<String,String>childToParent =newHashMap<>();
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for (List<String>region :regions) {
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for (inti =1;i <region.size();i++) {
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Stringparent =region.get(0);
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Stringchild =region.get(i);
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childToParent.put(child,parent);
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}
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}
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List<String>path1 =findPath(childToParent,region1);
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List<String>path2 =findPath(childToParent,region2);
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inti =path1.size() -1;
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intj =path2.size() -1;
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for (;i >=0 &&j >=0; ) {
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if (path1.get(i).equals(path2.get(j))) {
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i--;
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j--;
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}else {
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if (i ==path1.size() -1) {
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returnpath1.get(i);
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}else {
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returnpath1.get(i +1);
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}
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}
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}
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if (i <0) {
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returnpath1.get(0);
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}else {
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returnpath2.get(0);
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}
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}
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privateList<String>findPath(Map<String,String>childToParent,Stringleaf) {
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List<String>path =newArrayList<>();
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do {
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path.add(leaf);
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if (childToParent.containsKey(leaf)) {
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leaf =childToParent.get(leaf);
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}else {
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break;
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}
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}while (true);
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returnpath;
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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._1257;
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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_1257Test {
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privatestatic_1257.Solution1solution1;
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@BeforeClass
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publicstaticvoidsetup() {
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solution1 =new_1257.Solution1();
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}
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@Test
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publicvoidtest1() {
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assertEquals("North America",solution1.findSmallestRegion(
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Arrays.asList(Arrays.asList("Earth","North America","South America"),
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Arrays.asList("North America","United States","Canada"),
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Arrays.asList("United States","New York","Boston"),
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Arrays.asList("Canada","Ontario","Quebec"),
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Arrays.asList("South America","Brazil")),"Quebec","New York"));
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}
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@Test
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publicvoidtest2() {
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assertEquals("Canada",solution1.findSmallestRegion(
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Arrays.asList(Arrays.asList("Earth","North America","South America"),
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Arrays.asList("North America","United States","Canada"),
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Arrays.asList("United States","New York","Boston"),
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Arrays.asList("Canada","Ontario","Quebec"),
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Arrays.asList("South America","Brazil")),
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"Canada","Quebec"));
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}
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@Test
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publicvoidtest3() {
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assertEquals("Earth",solution1.findSmallestRegion(
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Arrays.asList(Arrays.asList("Earth","North America","South America"),
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Arrays.asList("North America","United States","Canada"),
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Arrays.asList("United States","New York","Boston"),
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Arrays.asList("Canada","Ontario","Quebec"),
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Arrays.asList("South America","Brazil")),
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"Canada","South America"));
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}
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@Test
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publicvoidtest4() {
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assertEquals("GfAj",solution1.findSmallestRegion(
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Arrays.asList(Arrays.asList("zDkA","GfAj","lt"),
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Arrays.asList("GfAj","rtupD","og","l"),
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Arrays.asList("rtupD","IT","jGcew","ZwFqF"),
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Arrays.asList("og","yVobt","EjA","piUyQ"),
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Arrays.asList("IT","XFlc","W","rB"),
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Arrays.asList("l","GwQg","shco","Dub","KwgZq"),
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Arrays.asList("jGcew","KH","lbW"),
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Arrays.asList("KH","BZ","sauG"),
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Arrays.asList("sNyV","WbrP"),
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Arrays.asList("oXMG","uqe"),
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Arrays.asList("ALlyw","jguyA","Mi"),
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Arrays.asList("PnGPY","Ev","lI"),
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Arrays.asList("wmYF","xreBK"),
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Arrays.asList("x","dclJ"),
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Arrays.asList("JyOSt","i"),
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Arrays.asList("yEH","UY","GIwLp"),
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Arrays.asList("lbW","M"),
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Arrays.asList("th","JyOSt","ALlyw"),
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Arrays.asList("ZwFqF","GDl"),
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Arrays.asList("Zqk","th"),
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Arrays.asList("Aa","wmYF"),
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Arrays.asList("nQ","IOw"),
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Arrays.asList("oGg","x"),
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Arrays.asList("pLGYN","ldb"),
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Arrays.asList("XjpeC","vK","aaO","D"),
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Arrays.asList("a","TekG","zp"),
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Arrays.asList("Dub","PnGPY"),
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Arrays.asList("SOvB","iD","pLGYN","Zqk"),
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Arrays.asList("bmFhM","SOvB","RWsEM","z"),
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Arrays.asList("SAH","bmFhM"),
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Arrays.asList("GEs","oXMG","tNJYJ"),
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Arrays.asList("zh","PWeEf"),
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Arrays.asList("Mfb","GEs","XjpeC","p"),
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Arrays.asList("Sn","rVIh","twv","pYA","Ywm"),
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Arrays.asList("piUyQ","G","aTi"),
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Arrays.asList("If","e","y","quEA","sNyV"),
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Arrays.asList("XFlc","Sn","ftXOZ"),
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Arrays.asList("lt","Q","fWB","a","Wk","zpqU"),
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Arrays.asList("xsUkW","Cssa","TgPi","qx"),
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Arrays.asList("sauG","If","nK","HHOr","yEH","YWMgF"),
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Arrays.asList("shco","xsUkW"),
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Arrays.asList("GwQg","Mfb","gr","S","nQ"),
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Arrays.asList("v","SAH","Rjr"),
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Arrays.asList("BZ","v","zh","oGg","WP"),
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Arrays.asList("yVobt","Aa","lJRmv")
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),
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"RWsEM","GfAj"));
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}
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}

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