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Check if the Xor of the frequency of all digits of a number N is zero or not

  • Last Updated : 28 Apr, 2021

Given a number N, the task is to check if xor value of the frequency of the digits is zero or not.
Examples: 
 

Input: N = 122233
Output: Yes
Frequencies of 1, 2 and 3 are 1, 3, 2 respectively.
And Xor of 1, 3 and 2 is 0.

Input: N = 123
Output: No

 

Approach: Count the frequency of all the digits and then iterate over all frequency and xor them if the answer is zero then print Yes else No.
Below is the implementation of the above approach: 
 

C++




// C++ implementation of the above approach
#include<bits/stdc++.h>
using namespace std;
 
bool check(int s)
{
 
// creating a frequency array
    int freq[10] = {0},r;
    while(s != 0)
    {
 
    // Finding the last digit of the number
        r = s % 10;
 
        // Dividing the number by 10 to
        // eliminate last digit
        s = int(s / 10);
 
        // counting frequency of each digit
        freq[r] += 1;
    }
 
         
 
    int xor__ = 0;
 
    // checking if the xor of all frequency is zero or not
    for (int i=0;i<10;i++)
    {
    xor__ = xor__ ^ freq[i];
    if(xor__ == 0)
        return true;
    else
        return false;
    }
         
}
 
// Driver function
int main()
{
 
int s = 122233;
if(check(s))
cout<<"Yes"<<endl;
else
    cout<<"No"<<endl;
}
 
// This code is contributed by
// Surendra_Gangwar

Java




// Java implementation of the above approach
class GFG
{
static boolean check(int s)
{
 
// creating a frequency array
    int[] freq = new int[10];
     
    int r,i;
    for(i=0;i<10;i++)
    {
        freq[i]= 0;
    }
    while(s != 0)
    {
 
    // Finding the last digit of the number
        r = s % 10;
 
        // Dividing the number by 10 to
        // eliminate last digit
        s = (int)(s / 10);
 
        // counting frequency of each digit
        freq[r] += 1;
    }
 
         
 
    int xor__ = 0;
 
    // checking if the xor of all frequency is zero or not
    for ( i=0;i<10;i++)
    {
    xor__ = xor__ ^ freq[i];
    if(xor__ == 0)
        return true;
    else
        return false;
    }
    return true;
         
}
 
// Driver function
    public static void main(String[] args) {
        int s = 122233;
        if(check(s))
            System.out.println("Yes\n");
        else
            System.out.println("No\n");
}
 
// This code is contributed by
// Rajput-Ji
}

Python3




# Python implementation of the above approach
def check(s):
 
    # creating a frequency array
    freq =[0]*10
    while(s != 0):
 
        # Finding the last digit of the number
        r = s % 10
 
        # Dividing the number by 10 to
        # eliminate last digit
        s = s//10
 
        # counting frequency of each digit
        freq[r]+= 1
 
    xor = 0
 
    # checking if the xor of all frequency is zero or not
    for i in range(10):
        xor = xor ^ freq[i]
    if(xor == 0):
        return True
    else:
        return False
 
s = 122233
if(check(s)):
    print("Yes")
else:
    print("No")

C#




// C# implementation of the above approach
using System;
 
class GFG
{
     
static bool check(int s)
{
 
    // creating a frequency array
    int[] freq = new int[10];
     
    int r, i;
    for(i = 0; i < 10; i++)
    {
        freq[i]= 0;
    }
    while(s != 0)
    {
 
    // Finding the last digit of the number
        r = s % 10;
 
        // Dividing the number by 10 to
        // eliminate last digit
        s = (int)(s / 10);
 
        // counting frequency of each digit
        freq[r] += 1;
    }
 
    int xor__ = 0;
 
    // checking if the xor of all frequency is zero or not
    for ( i = 0; i < 10; i++)
    {
    xor__ = xor__ ^ freq[i];
    if(xor__ == 0)
        return true;
    else
        return false;
    }
    return true;
         
}
 
    // Driver code
    public static void Main()
    {
        int s = 122233;
        if(check(s))
            Console.Write("Yes\n");
        else
            Console.Write("No\n");
    }
}
 
// This code is contributed by Ita_c.

PHP




<?php
// PHP implementation of the above approach
function check($s)
{
    // creating a frequency array
    $freq =array_fill(0,10,0);
    while($s != 0)
    {
        // Finding the last digit of the number
        $r = $s % 10;
 
        // Dividing the number by 10 to
        // eliminate last digit
        $s = (int)($s/10);
 
        // counting frequency of each digit
        $freq[$r]+= 1;
    }
    $xor = 0;
 
    // checking if the xor of all frequency is zero or not
    for($i=0;$i<10;$i++)
        $xor = $xor ^ $freq[$i];
    if($xor == 0)
        return true;
    else
        return false;
}
 
// Main Drive
$s = 122233;
if(check($s))
    print("Yes");
else
    print("No");
 
// This code is contributed by mits
?>

Javascript




<script>
 
// Javascript implementation of
// the above approach
 
function check(s)
{
 
// creating a frequency array
    let freq = new Array(10).fill(0), r;
    while(s != 0)
    {
 
    // Finding the last digit of the number
        r = s % 10;
 
        // Dividing the number by 10 to
        // eliminate last digit
        s = parseInt(s / 10);
 
        // counting frequency of each digit
        freq[r] += 1;
    }
 
         
 
    let xor__ = 0;
 
    // checking if the xor of all
    // frequency is zero or not
    for (let i=0;i<10;i++)
    {
    xor__ = xor__ ^ freq[i];
    if(xor__ == 0)
        return true;
    else
        return false;
    }
         
}
 
// Driver function
 
let s = 122233;
if(check(s))
document.write("Yes");
else
    document.write("No");
     
</script>
Output: 
Yes

 


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