Hướng dẫn hackerrank 2d array python

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• RishC

  6 years ago+ 75 comments

  Python3 answer

  sum = []
  
  
  for i in range[len[arr]-2]:
      for j in range[len[arr]-2]:
          sum.append[arr[i][j]+arr[i][j+1]+arr[i][j+2]+arr[i+1][j+1]+arr[i+2][j]+arr[i+2][j+1]+arr[i+2][j+2]]
          
  print[max[sum]]
  

Homeinterview prepration kitHackerRank 2D Array - DS problem solution

In this HackerRank 2D Array - DS interview preparation kit problem you have to Calculate the hourglass sum for every hourglass arr, then print the maximum hourglass sum. The array will always be 6 x 6.

Problem solution in Python programming.

#!/bin/python3

import math
import os
import random
import re
import sys

# Complete the hourglassSum function below.
def hourglassSum[arr]:
    maxSum = -63
    
    for i in range[4]:
        for j in range[4]:
        
            # sum of top 3 elements
            top = sum[arr[i][j:j+3]]
            
            # sum of the mid element
            mid = arr[i+1][j+1]
            
            # sum of bottom 3 elements
            bottom = sum[arr[i+2][j:j+3]]
            
            hourglass = top + mid + bottom
            
            if hourglass > maxSum:
                maxSum = hourglass
                
    return maxSum

if __name__ == '__main__':
    fptr = open[os.environ['OUTPUT_PATH'], 'w']

    arr = []

    for _ in range[6]:
        arr.append[list[map[int, input[].rstrip[].split[]]]]

    result = hourglassSum[arr]

    fptr.write[str[result] + '\n']

    fptr.close[]

Problem solution in Java Programming.

import java.io.*;
import java.util.*;

public class Solution {

    public static void main[String[] args] {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner sc = new Scanner[System.in];
        int[][] array = new int[6][6];
        for [int y = 0; y < 6; y++]{
            for [int x =0; x