Hackerrank - Designer PDF Viewer

Hackerrank – Problem Statement

A description of the problem can be found on Hackerrank.

Solution

Find a max height of given characters. Square is max height multiplied with length of the string.

I created solution in:

Scala
Java
JavaScript
Ruby

All solutions are also available on my GitHub.

Java

import java.util.*;

public class Solution {

    public static void main(String[] args) {
        Scanner stdin = new Scanner(System.in);
        Object[] heights = Arrays.stream(stdin.nextLine().split(" "))
                .map(Integer::parseInt).toArray();
        String word = stdin.nextLine();
        int maxHeight = 0;
        for(int i = 0; i < word.length(); i++) {
            int charIndex = word.charAt(i) - 'a';
            int height = (int) heights[charIndex];
            if(height > maxHeight) {
                maxHeight = height;
            }
        }

        long square = word.length() * maxHeight;
        System.out.println(square);
        stdin.close();
    }
}

import java.util.*;

public class Solution {

public static void main(String[] args) {

Scanner stdin = new Scanner(System.in);

Object[] heights = Arrays.stream(stdin.nextLine().split(" "))

.map(Integer::parseInt).toArray();

String word = stdin.nextLine();

int maxHeight = 0;

for(int i = 0; i < word.length(); i++) {

int charIndex = word.charAt(i) - 'a';

int height = (int) heights[charIndex];

if(height > maxHeight) {

maxHeight = height;

}

long square = word.length() * maxHeight;

System.out.println(square);

stdin.close();

}

JavaScript

'use strict';

const processData = input => {
    const lines = input.split('\n');
    const heights = lines[0].split(' ').map(i => parseInt(i));
    const word = lines[1];
    let maxHeight = 0;
    for(let i = 0; i < word.length; i++) {
        const charIndex = word[i].codePointAt() - 97;
        const height = heights[charIndex];
        if(height > maxHeight) {
            maxHeight = height;
        }
    }

    const square = word.length * maxHeight;
    console.log(square);
};

process.stdin.resume();
process.stdin.setEncoding("ascii");

let _input = "";
process.stdin.on("data", input => _input += input);
process.stdin.on("end", () => processData(_input));

'use strict';

const processData = input => {

const lines = input.split('\n');

const heights = lines[0].split(' ').map(i => parseInt(i));

const word = lines[1];

let maxHeight = 0;

for(let i = 0; i < word.length; i++) {

const charIndex = word[i].codePointAt() - 97;

const height = heights[charIndex];

if(height > maxHeight) {

maxHeight = height;

}

const square = word.length * maxHeight;

console.log(square);

};

process.stdin.resume();

process.stdin.setEncoding("ascii");

let _input = "";

process.stdin.on("data", input => _input += input);

process.stdin.on("end", () => processData(_input));

Scala

import scala.io.Source

object DesignerPdfViewer extends App {
  val lines = Source.stdin.getLines().toList
  val heights = lines.head.split(" ").map(_.toInt)
  val word = lines(1)
  val characterIndexes = word.map(_ - 'a')
  val maxHeight = characterIndexes.map(heights(_)).max

  val square = word.length * maxHeight
  println(square)
}
}

import scala.io.Source

object DesignerPdfViewer extends App {

val lines = Source.stdin.getLines().toList

val heights = lines.head.split(" ").map(_.toInt)

val word = lines(1)

val characterIndexes = word.map(_ - 'a')

val maxHeight = characterIndexes.map(heights(_)).max

val square = word.length * maxHeight

println(square)

}

Ruby

heights = gets.strip.split.map(&:to_i)
word = gets.strip
charHeights = word.chars.map{|c| heights[c.ord - 97]}
max = charHeights.max
square = word.size * max

puts square

heights = gets.strip.split.map(&:to_i)

word = gets.strip

charHeights = word.chars.map{|c| heights[c.ord - 97]}

max = charHeights.max

square = word.size * max

puts square

Pavol Pidanič

I can count to 1023 with 10 fingers

Hackerrank – Designer PDF Viewer