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Commitba5cfeb

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Add 1690 (#140)
* Add 1690* Fix checkstyleMain
1 parentc9ec779 commitba5cfeb

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2 files changed

+68
-0
lines changed

2 files changed

+68
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Lines changed: 46 additions & 0 deletions
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packagecom.fishercoder.solutions;
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publicclass_1690 {
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publicstaticclassSolution1 {
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int[]stonesRef;
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int[]prepareSums;
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int[][]maxDiffScoureBetweenTowPlayerWhenPlayInPosItoJ =newint[1005][1005];
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publicintstoneGameVII(int[]stones) {
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this.stonesRef =stones;
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inttotalStonesNumber =stones.length;
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this.prepareSums =newint[totalStonesNumber +1];
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for (inti =1;i <=totalStonesNumber;i++) {
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this.prepareSums[i] =this.prepareSums[i -1] +stones[i -1];
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}
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for (intlen =1;len <=totalStonesNumber;len++) {
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for (inti =1;i +len -1 <=totalStonesNumber;i++) {
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intj =i +len -1;
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this.setMaxDiffScoureBetweenTowPlayerWhenPlayInPosItoJ(i,j);
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}
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}
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returnmaxDiffScoureBetweenTowPlayerWhenPlayInPosItoJ[1][totalStonesNumber];
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}
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privatevoidsetMaxDiffScoureBetweenTowPlayerWhenPlayInPosItoJ(inti,intj) {
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if (j -i ==0) {
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maxDiffScoureBetweenTowPlayerWhenPlayInPosItoJ[i][j] =0;
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}elseif (j -i ==1) {
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maxDiffScoureBetweenTowPlayerWhenPlayInPosItoJ[i][j] =Math.max(stonesRef[i -1],stonesRef[j -1]);
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}else {
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maxDiffScoureBetweenTowPlayerWhenPlayInPosItoJ[i][j] =Math.max(
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this.sumOfTheStonesValueInPosIToJ(i +1,j)
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-maxDiffScoureBetweenTowPlayerWhenPlayInPosItoJ[i +1][j],
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this.sumOfTheStonesValueInPosIToJ(i,j -1)
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-maxDiffScoureBetweenTowPlayerWhenPlayInPosItoJ[i][j -1]);
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}
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}
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privateintsumOfTheStonesValueInPosIToJ(inti,intj) {
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returnthis.prepareSums[j] -this.prepareSums[i -1];
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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._1690;
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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_1690Test {
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privatestatic_1690.Solution1solution1;
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@BeforeClass
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publicstaticvoidsetup() {
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solution1 =new_1690.Solution1();
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}
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@Test
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publicvoidtest1() {
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assertEquals(6,solution1.stoneGameVII(newint[]{5,3,1,4,2}));
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}
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}

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