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#java #gfg #geeksforgeeks #arrays #practice #frequencycount #frequencies #limitedrange

Frequencies of Limited Range Array Elements

class Solution{
    //Function to count the frequency of all elements from 1 to N in the array.
    public static void frequencyCount(int arr[], int N, int P)
    {
        //Decreasing all elements by 1 so that the elements
        //become in range from 0 to n-1.
        int maxi = Math.max(P,N);
        int count[] = new int[maxi+1];
        Arrays.fill(count, 0);
        for(int i=0;i<N;i++){
            count[arr[i]]++; 
        }
        
        for(int i=0;i<N;i++){
            arr[i] = count[i+1];
        }
    }
}

#java #gfg #geeksforgeeks #lecture #arrays #sortedarray #frequencies

Frequencies in a Sorted Array

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

class GFG 
{ 
    static void printFreq(int arr[], int n)
    {
    	int freq = 1, i = 1;

    	while(i < n)
    	{
    		while(i < n && arr[i] == arr[i - 1])
    		{
    			freq++;
    			i++;
    		}

    		System.out.println(arr[i - 1] + " " + freq);

    		i++;
    		freq = 1;
    	}
    }

    public static void main(String args[]) 
    { 
       int arr[] = {10, 10, 20, 30, 30, 30}, n = 6;

       printFreq(arr, n);
    } 
}

Frequencies of Limited Range Array Elements

Frequencies in a Sorted Array

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