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Commit8c536fb

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‎README.md

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@@ -428,6 +428,7 @@ _If you like this project, please leave me a star._ ★
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|870|[Advantage Shuffle](https://leetcode.com/problems/advantage-shuffle/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_870.java) | |Medium|Array, Greedy
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|868|[Binary Gap](https://leetcode.com/problems/binary-gap/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_868.java)||Easy|
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|867|[Transpose Matrix](https://leetcode.com/problems/transpose-matrix/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_867.java)||Easy|
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|861|[Score After Flipping Matrix](https://leetcode.com/problems/score-after-flipping-matrix/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_861.java) | |Medium| Greedy
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|860|[Lemonade Change](https://leetcode.com/problems/lemonade-change/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_860.java)||Easy|
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|859|[Buddy Strings](https://leetcode.com/problems/buddy-strings/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_859.java)||Easy|
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|856|[Score of Parentheses](https://leetcode.com/problems/score-of-parentheses/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_856.java) | |Medium| Stack, String
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packagecom.fishercoder.solutions;
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publicclass_861 {
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publicstaticclassSolution1 {
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/**
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* We can simply apply greedy methodology here.
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* 1. we check if the left most digits are ones or not, if it's a zero,
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* then we'll just flip this entire row, reason being the left most digit carries the biggest weight when interpreting this binary row/number;
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* 2. after step #1, we'll check column wise starting from the second column,
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* we'll count the number of ones in each column, if the number of ones in each column is less than or equal to half of the column length,
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* then flipping this column would make a bigger number
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*/
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publicintmatrixScore(int[][]A) {
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intm =A.length;
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intn =A[0].length;
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for (inti =0;i <m;i++) {
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if (A[i][0] ==0) {
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for (intj =0;j <n;j++) {
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if (A[i][j] ==0) {
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A[i][j] =1;
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}else {
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A[i][j] =0;
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}
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}
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}
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}
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for (intj =1;j <n;j++) {
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intones =0;
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for (inti =0;i <m;i++) {
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if (A[i][j] ==1) {
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ones++;
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}
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}
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if (ones <=m /2) {
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for (inti =0;i <m;i++) {
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if (A[i][j] ==1) {
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A[i][j] =0;
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}else {
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A[i][j] =1;
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}
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}
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}
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}
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intresult =0;
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for (inti =0;i <m;i++) {
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StringBuildersb =newStringBuilder();
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for (intj =0;j <n;j++) {
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sb.append(A[i][j]);
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}
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result +=Integer.parseInt(sb.toString(),2);
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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.common.utils.CommonUtils;
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importcom.fishercoder.solutions._861;
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importorg.junit.BeforeClass;
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importorg.junit.Test;
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importstaticorg.junit.Assert.assertEquals;
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publicclass_861Test {
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privatestatic_861.Solution1solution1;
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@BeforeClass
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publicstaticvoidsetup() {
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solution1 =new_861.Solution1();
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}
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@Test
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publicvoidtest1() {
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assertEquals(39,solution1.matrixScore(CommonUtils.convertLeetCodeIrregularLengths2DArrayInputIntoJavaArray("[0,0,1,1],[1,0,1,0],[1,1,0,0]")));
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}
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}

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