CaeserCipher.java

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class CaeserCipher {

    static String caesarCipher(String s, int k) {
        k=k%26;
        String z="";
        for(int i=0;i<s.length();i++){
            char t=s.charAt(i);
            int r=(int)t;
            if (Character.isLetter(t) && Character.isLowerCase(t)){
                int p = 97+(r-97+k)%26;
                System.out.println(t+","+r+","+p+","+(char)p);
                z=z+(char)p;
            }
            else if(Character.isLetter(t) && Character.isUpperCase(t)){
                int q = 65+(r-65+k)%26;
                System.out.println(t+","+r+","+q+","+(char)q);
                z=z+(char)q;
            }
            else{
                z=z+t;
            }
        }
        return z;
    }

    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
        int n = scanner.nextInt();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
        String s = scanner.nextLine();
        int k = scanner.nextInt();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
        String result = caesarCipher(s, k);
        bufferedWriter.write(result);
        bufferedWriter.newLine();
        bufferedWriter.close();
        scanner.close();
    }
}