Jack-Saleem

import java.util.Scanner;
public class Squats
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        short n=z.nextShort();
        String x=z.next();
        int a=Math.max(x.replaceAll("X", "").length(), x.replaceAll("x", "").length())-n/2;
        System.out.println(a);

Jack-Saleem

import java.util.ArrayList;
import java.util.Scanner;
public class PrimeNumbers
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        int n=z.nextInt();
        ArrayList al=new ArrayList();
        for(int i=2;i<=3000;i++){

Jack-Saleem

import java.math.BigInteger;
import java.util.Scanner;
public class Lever
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        String[] xx=z.next().split("\\^");
        StringBuilder sb=new StringBuilder(xx[0]);
        xx[0]= sb.reverse().toString();

Jack-Saleem

import java.util.Scanner;
public class Presents
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        int n=z.nextInt();
        int[] a=new int[n+1];
        for(int i=1;i<n+1;i++)
            a[i]=z.nextInt();

Jack-Saleem

import java.util.ArrayList;
import java.util.Scanner;
public class VasyaAndSocks
{//same as NewYearCandles
    ArrayList<Integer> r = new ArrayList<Integer>();
    int x = 0;
    int socks(int a , int b)
    {
        int counter = 0;
        while(a/b != 0){

Jack-Saleem

import java.util.ArrayList;
import java.util.Scanner;
public class VasyaAndSocks
{//same as NewYearCandles
    ArrayList<Integer> r = new ArrayList<Integer>();
    int x = 0;
    int socks(int a , int b)
    {
        int counter = 0;
        while(a/b != 0){

Jack-Saleem

import java.util.Scanner;

public class ValeraAndX
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        int n=z.nextInt();
        String x[]=new String[n];
        StringBuilder sb=new StringBuilder();

Jack-Saleem

import java.util.Scanner;

public class LittlePonyandCrystalMine
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        int n=z.nextInt();
        StringBuilder sb=new StringBuilder();
        String x[]=new String[n];

Jack-Saleem

import java.util.Scanner;
public class BeautifulMatrix
{
    public static void main(String args[])
    {
        Scanner z = new Scanner(System.in);
        int[][] a=new int[6][6];
        for(int i=1;i<=5;i++)
        {
            for(int j=1;j<=5;j++)

Jack-Saleem

import java.util.Scanner;
public class LuckyDivision
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        int a=z.nextInt();
        int[] l={4,7,44,47,74,77,444,447,474,477,744,747,774,777};
        int ctr=0;
        for(int ll:l)