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  1. Prepare
  2. Data Structures
  3. Arrays
  4. Array Manipulation
  5. Discussions

Array Manipulation

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2449 Discussions

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  • jessupj
     + 0 comments

    Only consider the query indices.

    def arrayManipulation(n, queries):
    # Write your code here
    sweepline = {}

    # O(N)
    for (start, end, value) in queries:
        sweepline[start] = sweepline.get(start, 0) + value
        sweepline[end + 1] = sweepline.get(end + 1, 0) - value

    maxnum = float("-inf")
    curr = 0 
    
    for index in sorted(sweepline.keys()):
        curr += sweepline[index]
        maxnum = max(maxnum, curr)
    
    return maxnum

  • roohi_shama
     + 0 comments

    function arrayManipulation(n: number, queries: number[][]): number {

    let arr: number[] = Array(n+1).fill(0)
let max = 0;

queries.forEach((el)=>{
    let a = el[0]
    let b = el[1]
    let k = el[2]

    arr[a-1] = arr[a-1] + k
    arr[b] = arr[b] - k
})
let sum = 0;
for (let i = 0; i< arr.length-1; i++){
    sum = sum + arr[i]
    sum > max ? max = sum : null
}
return max

    }

  • khandanish5
     + 0 comments
        public static long arrayManipulation(int n, List<List<Integer>> queries) {
        long[] array = new long[n+2];
        for(int i = 0; i < queries.size(); i++) {
            long numberToAdd = queries.get(i).get(2);
            int startIndex = queries.get(i).get(0);
            int endIndex = queries.get(i).get(1);
            
            array[startIndex] += numberToAdd;     
            array[endIndex+1] -= numberToAdd;
        }
        long max = 0;
        for(int i = 1; i < array.length; i++) {
            array[i] += array[i-1];
            max = Math.max(array[i],max);
        }
        return max;
    }

  • asadgood12321
     + 0 comments

    Array manipulation involves performing various operations on arrays to acquire preferred results. Common manipulations include including, casting off, or updating factors, and more complex operations like merging, cutting, and filtering. Techniques for green array manipulation are crucial in programming, as they can bamboo sheets king appreciably impact overall performance and memory utilization. Arrays can be manipulated the use of built-in methods in many programming languages, which include push(), pop(), shift(), unshift() in JavaScript, or the usage of library functions in languages like Python and Java. Mastery of these operations is fundamental for effective statistics dealing with in software development.

  • AbshkRana
     + 0 comments

    If your code is timing out. Use prefix array method, I used https://akd3257.medium.com/understanding-the-concept-of-prefix-sum-array-70fb333169a4 to understand the concept.

    Solution in Ruby:

    def arrayManipulation(n, queries)
    prefix_sum_array = Array.new(n, 0)
    queries.each do |query|
      prefix_sum_array[query[0] - 1] += query[2]
      next if query[1] >= prefix_sum_array.length

      prefix_sum_array[query[1]] -= query[2]
    end
    max_sum = 0
    prefix_sum_array.each_with_index do |_sum, index|
      next if index == 0
      prefix_sum_array[index] += prefix_sum_array[index - 1]
      max_sum = prefix_sum_array[index] if prefix_sum_array[index] > max_sum
    end
    max_sum
end