Pavol Pidanič

Hackerrank – Grading Students

Hackerrank – Popis problému Celý popis zadania sa nacháza – Hackerrank. Riešenie Treba pretransformovať každú známku podľa profesorových pravidiel: – najprv si zistím koľkonásobok 5 je daná známka (n) – ak je deliteľná 5 bezo zvyšku, vôbec ju neupravujem — ak nie je, zaokrúhlim ju: (n + 1) * 5 – zistím najbližší násobok 5 […]

Hackerrank – Between Two Sets

Hackerrank – Popis problému Celý popis zadania sa nacháza – Hackerrank. Riešenie Vytvorim si pole všetkých pozitívnych čísel, ktoré spĺňajú podmienky úlohy. Bude obsahovať prvky od do . Pre všetky tieto prvky zistím, či pre všetky a . Vypíšem počet takých čísel. Počiatočné pole sa dá zmenšiť. Bude obsahovať len čísla […]

Hackerrank – The Hurdle Race

Hackerrank – Popis problému Celý popis zadania sa nacháza – Hackerrank. Riešenie Je potrebné nájsť najvyššiu prekážku v pretekoch. Ak je väčšia ako k, urobiť ich rozdiel a odstaneme počet nápojov, ktoré stačí vypiť. Inak vypíšeme 0. Vytvoril som riešenie v týchto programovacích jazykoch: Scala Java Javascript Ruby Všetky riešenia sú dostupné aj na mojom […]

Hackerrank – Java End-of-file

Hackerrank – Popis problému Celý popis zadania sa nacháza – Hackerrank. Riešenie Vytvoril som riešenie v týchto programovacích jazykoch: Java Všetky riešenia sú dostupné aj na mojom GitHub profile. Java

import java.util.*;

class Solution {
    public static void main(String [] args) {
        Scanner sc = new Scanner(System.in);
        int line = 1;
        while (sc.hasNextLine()) {
            System.out.println(line ++ + " " + sc.nextLine());
        }
        sc.close();
    }
}

import java.util.*;

class Solution {

public static void main(String [] args) {

Scanner sc = new Scanner(System.in);

int line = 1;

while (sc.hasNextLine()) {

System.out.println(line ++ + " " + sc.nextLine());

}

sc.close();

}

Hackerrank – Java Datatypes

import java.util.*;

class Solution{
    public static void main(String []argh)
    {
        Scanner sc = new Scanner(System.in);
        int t = sc.nextInt();
        for(int i = 0; i < t; i++) {
            try {
                long x = sc.nextLong();
                System.out.println(x + " can be fitted in:");
                if(x >= -128 && x <= 127) {
                    System.out.println("* byte");
                }
                if(x >= Short.MIN_VALUE && x <= Short.MAX_VALUE) {
                    System.out.println("* short");
                }
                if(x >= Integer.MIN_VALUE && x <= Integer.MAX_VALUE) {
                    System.out.println("* int");
                }
                if(x >= Long.MIN_VALUE && x <= Long.MAX_VALUE) {
                    System.out.println("* long");
                }
            } catch(Exception e) {
                System.out.println(sc.next() + " can't be fitted anywhere.");
            }
        }
    }
}

import java.util.*;

class Solution{

public static void main(String []argh)

{

Scanner sc = new Scanner(System.in);

int t = sc.nextInt();

for(int i = 0; i < t; i++) {

try {

long x = sc.nextLong();

System.out.println(x + " can be fitted in:");

if(x >= -128 && x <= 127) {

System.out.println("* byte");

}

if(x >= Short.MIN_VALUE && x <= Short.MAX_VALUE) {

System.out.println("* short");

}

if(x >= Integer.MIN_VALUE && x <= Integer.MAX_VALUE) {

System.out.println("* int");

}

if(x >= Long.MIN_VALUE && x <= Long.MAX_VALUE) {

System.out.println("* long");

}

} catch(Exception e) {

System.out.println(sc.next() + " can't be fitted anywhere.");

}

Hackerrank – Java Currency Formatter

import java.util.*;
import java.text.*;

public class Solution {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double payment = scanner.nextDouble();
        scanner.close();

        NumberFormat usFormat = NumberFormat.getCurrencyInstance(Locale.US);
        NumberFormat cnFormat = NumberFormat.getCurrencyInstance(Locale.CHINA);
        NumberFormat frFormat = NumberFormat.getCurrencyInstance(Locale.FRANCE);
        NumberFormat inFormat = NumberFormat.getCurrencyInstance(new Locale("en", "in"));

        String us = usFormat.format(payment);
        String india = inFormat.format(payment);
        String france = frFormat.format(payment);
        String china = cnFormat.format(payment);

        System.out.println("US: " + us);
        System.out.println("India: " + india);
        System.out.println("China: " + china);
        System.out.println("France: " + france);
    }
}

import java.util.*;

import java.text.*;

public class Solution {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

double payment = scanner.nextDouble();

scanner.close();

NumberFormat usFormat = NumberFormat.getCurrencyInstance(Locale.US);

NumberFormat cnFormat = NumberFormat.getCurrencyInstance(Locale.CHINA);

NumberFormat frFormat = NumberFormat.getCurrencyInstance(Locale.FRANCE);

NumberFormat inFormat = NumberFormat.getCurrencyInstance(new Locale("en", "in"));

String us = usFormat.format(payment);

String india = inFormat.format(payment);

String france = frFormat.format(payment);

String china = cnFormat.format(payment);

System.out.println("US: " + us);

System.out.println("India: " + india);

System.out.println("China: " + china);

System.out.println("France: " + france);

}

Hackerrank – Java Date and Time

import java.util.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int month = in.nextInt();
        int day = in.nextInt();
        int year = in.nextInt();

        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.YEAR, year);
        cal.set(Calendar.MONTH, month - 1);
        cal.set(Calendar.DAY_OF_MONTH, day);

        int weekDay = cal.get(Calendar.DAY_OF_WEEK);
        String dayName = "";
        switch (weekDay) {
            case Calendar.MONDAY: dayName = "MONDAY"; break;
            case Calendar.TUESDAY: dayName = "TUESDAY"; break;
            case Calendar.WEDNESDAY: dayName = "WEDNESDAY"; break;
            case Calendar.THURSDAY: dayName = "THURSDAY"; break;
            case Calendar.FRIDAY: dayName = "FRIDAY"; break;
            case Calendar.SATURDAY: dayName = "SATURDAY"; break;
            case Calendar.SUNDAY: dayName = "SUNDAY"; break;
        }
        System.out.println(dayName);
    }
}

import java.util.*;

public class Solution {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

int month = in.nextInt();

int day = in.nextInt();

int year = in.nextInt();

Calendar cal = Calendar.getInstance();

cal.set(Calendar.YEAR, year);

cal.set(Calendar.MONTH, month - 1);

cal.set(Calendar.DAY_OF_MONTH, day);

int weekDay = cal.get(Calendar.DAY_OF_WEEK);

String dayName = "";

switch (weekDay) {

case Calendar.MONDAY: dayName = "MONDAY"; break;

case Calendar.TUESDAY: dayName = "TUESDAY"; break;

case Calendar.WEDNESDAY: dayName = "WEDNESDAY"; break;

case Calendar.THURSDAY: dayName = "THURSDAY"; break;

case Calendar.FRIDAY: dayName = "FRIDAY"; break;

case Calendar.SATURDAY: dayName = "SATURDAY"; break;

case Calendar.SUNDAY: dayName = "SUNDAY"; break;

}

System.out.println(dayName);

}

Hackerrank – Java Int to String

import java.util.*;
import java.security.*;

public class Solution {
    public static void main(String[] args) {

        DoNotTerminate.forbidExit();

        try {
            Scanner in = new Scanner(System.in);
            int n = in.nextInt();
            in.close();
            String s = String.valueOf(n);
            if (n == Integer.parseInt(s)) {
                System.out.println("Good job");
            } else {
                System.out.println("Wrong answer.");
            }
        } catch (DoNotTerminate.ExitTrappedException e) {
            System.out.println("Unsuccessful Termination!!");
        }
    }
}

//The following class will prevent you from terminating the code using exit(0)!
class DoNotTerminate {

    public static class ExitTrappedException extends SecurityException {

        private static final long serialVersionUID = 1;
    }

    public static void forbidExit() {
        final SecurityManager securityManager = new SecurityManager() {
            @Override
            public void checkPermission(Permission permission) {
                if (permission.getName().contains("exitVM")) {
                    throw new ExitTrappedException();
                }
            }
        };
        System.setSecurityManager(securityManager);
    }
}

import java.util.*;

import java.security.*;

public class Solution {

public static void main(String[] args) {

DoNotTerminate.forbidExit();

try {

Scanner in = new Scanner(System.in);

int n = in.nextInt();

in.close();

String s = String.valueOf(n);

if (n == Integer.parseInt(s)) {

System.out.println("Good job");

} else {

System.out.println("Wrong answer.");

}

} catch (DoNotTerminate.ExitTrappedException e) {

System.out.println("Unsuccessful Termination!!");

}

//The following class will prevent you from terminating the code using exit(0)!

class DoNotTerminate {

public static class ExitTrappedException extends SecurityException {

private static final long serialVersionUID = 1;

}

public static void forbidExit() {

final SecurityManager securityManager = new SecurityManager() {

@Override

public void checkPermission(Permission permission) {

if (permission.getName().contains("exitVM")) {

throw new ExitTrappedException();

}

};

System.setSecurityManager(securityManager);

}

Hackerrank – Java Static Initializer Block

import java.util.*;

class Solution {
    private static int B;
    private static int H;
    private static boolean flag = false;
    static {
        Scanner stdin = new Scanner(System.in);
        B = stdin.nextInt();
        H = stdin.nextInt();
        flag = B > 0 && H > 0;
        if(!flag) {
            System.out.println("java.lang.Exception: Breadth and height must be positive");
        }
        stdin.close();
    }

    public static void main(String [] args) {
        if(flag){
            int area = B * H;
            System.out.print(area);
        }
    }
}

import java.util.*;

class Solution {

private static int B;

private static int H;

private static boolean flag = false;

static {

Scanner stdin = new Scanner(System.in);

B = stdin.nextInt();

H = stdin.nextInt();

flag = B > 0 && H > 0;

if(!flag) {

System.out.println("java.lang.Exception: Breadth and height must be positive");

}

stdin.close();

}

public static void main(String [] args) {

if(flag){

int area = B * H;

System.out.print(area);

}

Hackerrank – Java Loops II

import java.util.*;

class Solution{
    public static void main(String []argh){
        Scanner in = new Scanner(System.in);
        int t = in.nextInt();
        for(int i = 0; i < t; i ++){
            int a = in.nextInt();
            int b = in.nextInt();
            int n = in.nextInt();
            long prev = 0;
            for(int j = 0; j < n; j++) {
                long val = prev + ((long)Math.pow(2, j) * b);
                System.out.print((val + a) + " ");
                prev = val;
            }
            System.out.println();
        }
        in.close();
    }
}

import java.util.*;

class Solution{

public static void main(String []argh){

Scanner in = new Scanner(System.in);

int t = in.nextInt();

for(int i = 0; i < t; i ++){

int a = in.nextInt();

int b = in.nextInt();

int n = in.nextInt();

long prev = 0;

for(int j = 0; j < n; j++) {

long val = prev + ((long)Math.pow(2, j) * b);

System.out.print((val + a) + " ");

prev = val;

}

System.out.println();

}

in.close();

}