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Commit91f7d57

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add a solution for 368
1 parentb231cfb commit91f7d57

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2 files changed

+84
-45
lines changed

2 files changed

+84
-45
lines changed

‎src/main/java/com/fishercoder/solutions/_368.java‎

Lines changed: 35 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -7,6 +7,41 @@
77
publicclass_368 {
88

99
publicstaticclassSolution1 {
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/**
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* DP solution, credit: https://leetcode.com/problems/largest-divisible-subset/solution/ Solution 1
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*/
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publicList<Integer>largestDivisibleSubset(int[]nums) {
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List<List<Integer>>lists =newArrayList<>();
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Arrays.sort(nums);
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intlen =nums.length;
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if (len ==0) {
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returnnewArrayList<>();
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}
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for (inti =0;i <len;i++) {
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lists.add(newArrayList<>());
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}
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for (inti =0;i <len;i++) {
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List<Integer>maxSubset =newArrayList<>();
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for (intk =0;k <i;k++) {
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if (nums[i] %nums[k] ==0 &&maxSubset.size() <lists.get(k).size()) {
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maxSubset =lists.get(k);
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}
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}
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lists.get(i).addAll(maxSubset);
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lists.get(i).add(nums[i]);
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}
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List<Integer>ans =newArrayList<>();
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for (List<Integer>list :lists) {
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if (list.size() >ans.size()) {
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ans.clear();
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ans.addAll(list);
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}
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}
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returnans;
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}
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}
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publicstaticclassSolution2 {
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/**
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* Credit: https://discuss.leetcode.com/topic/49652/classic-dp-solution-similar-to-lis-o-n-2
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*/

‎src/test/java/com/fishercoder/_368Test.java‎

Lines changed: 49 additions & 45 deletions
Original file line numberDiff line numberDiff line change
@@ -6,51 +6,55 @@
66

77
importjava.util.Arrays;
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9-
importstaticorg.hamcrest.core.Is.is;
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importstaticorg.junit.Assert.assertThat;
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importstaticorg.junit.Assert.assertEquals;
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publicclass_368Test {
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privatestatic_368.Solution1solution1;
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privatestaticint[]nums;
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@BeforeClass
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publicstaticvoidsetup() {
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solution1 =new_368.Solution1();
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}
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@Test
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publicvoidtest1() {
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nums =newint[] {1,2,4,8};
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assertThat(solution1.largestDivisibleSubset(nums),is(Arrays.asList(8,4,2,1)));
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}
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@Test
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publicvoidtest2() {
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nums =newint[] {1,2,3};
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assertThat(solution1.largestDivisibleSubset(nums),is(Arrays.asList(2,1)));
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}
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@Test
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publicvoidtest3() {
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nums =newint[] {1};
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assertThat(solution1.largestDivisibleSubset(nums),is(Arrays.asList(1)));
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}
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@Test
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publicvoidtest4() {
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nums =newint[] {546,669};
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assertThat(solution1.largestDivisibleSubset(nums),is(Arrays.asList(546)));
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}
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@Test
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publicvoidtest5() {
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nums =newint[] {};
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assertThat(solution1.largestDivisibleSubset(nums),is(Arrays.asList()));
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}
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@Test
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publicvoidtest6() {
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nums =newint[] {4,8,10,240};
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assertThat(solution1.largestDivisibleSubset(nums),is(Arrays.asList(240,8,4)));
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}
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privatestatic_368.Solution1solution1;
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privatestatic_368.Solution2solution2;
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privatestaticint[]nums;
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@BeforeClass
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publicstaticvoidsetup() {
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solution1 =new_368.Solution1();
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solution2 =new_368.Solution2();
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}
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@Test
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publicvoidtest1() {
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nums =newint[]{1,2,4,8};
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assertEquals(Arrays.asList(1,2,4,8),solution1.largestDivisibleSubset(nums));
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assertEquals(Arrays.asList(8,4,2,1),solution2.largestDivisibleSubset(nums));
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}
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@Test
30+
publicvoidtest2() {
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nums =newint[]{1,2,3};
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assertEquals(solution1.largestDivisibleSubset(nums),Arrays.asList(1,2));
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assertEquals(solution2.largestDivisibleSubset(nums),Arrays.asList(2,1));
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}
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@Test
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publicvoidtest3() {
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nums =newint[]{1};
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assertEquals(solution1.largestDivisibleSubset(nums),Arrays.asList(1));
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}
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@Test
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publicvoidtest4() {
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nums =newint[]{546,669};
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assertEquals(solution1.largestDivisibleSubset(nums),Arrays.asList(546));
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}
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@Test
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publicvoidtest5() {
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nums =newint[]{};
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assertEquals(solution1.largestDivisibleSubset(nums),Arrays.asList());
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}
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@Test
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publicvoidtest6() {
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nums =newint[]{4,8,10,240};
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assertEquals(solution1.largestDivisibleSubset(nums),Arrays.asList(4,8,240));
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assertEquals(solution2.largestDivisibleSubset(nums),Arrays.asList(240,8,4));
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}
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}

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