Java > AP-1 > scoresClump (CodingBat Solution)

Problem:

Given an array of scores sorted in increasing order, return true if the array contains 3 adjacent scores that differ from each other by at most 2, such as with {3, 4, 5} or {3, 5, 5}.

scoresClump({3, 4, 5}) → true
scoresClump({3, 4, 6}) → false
scoresClump({1, 3, 5, 5}) → true


Solution:

public boolean scoresClump(int[] scores) {
  if (scores.length < 3)
    return false;
  
  for (int i = 0; i < scores.length-2; i++) {
    if (scores[i+2] - scores[i+1] <= 2 && scores[i+2] - scores[i] <= 2)
      return true;
  }
  return false;
}


3 comments :

  1. Couldn't you take out the "if (scores.length < 3) return false;" since if the length is less than 3, the "if" statement in the loop would never execute and thus end up hitting the final "return false;"
    Also, the array is in ascending order, so if "scores[i+2]-scores[i] <=2", "scores[i+2]-[i+1]" would automatically be true since the list is sorted.

    ReplyDelete
  2. public boolean scoresClump(int[] scores) {
    for(int i = 0; i < scores.length - 2; i++) {
    if(scores[i+2] - scores[i] <= 2) return true;
    }
    return false;
    }

    ReplyDelete
  3. for(int i=scores.length-1; i>=2; i--){
    if(scores[i] - scores[i-2] <=2) return true;
    }

    return false;

    ReplyDelete

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