Hackerrank - The Hurdle Race

Hackerrank – Problem Statement

A description of the problem can be found on Hackerrank.

Solution

We need to find the highest hurdle. If it is greater than k then substract its height with k and we have the result. Otherwise print 0.

I created solution in:

Scala
Java
JavaScript
Ruby

All solutions are also available on my GitHub profile.

Scala

object TheHurdleRace extends App {
  val sc = new java.util.Scanner (System.in)
  val n = sc.nextInt()
  val k = sc.nextInt()
  var height = new Array[Int](n)
  for(height_i <- 0 until n) {
    height(height_i) = sc.nextInt()
  }

  val maxHeight = height.max
  val beverages = if(maxHeight > k) maxHeight - k else 0

  println(beverages)
}

object TheHurdleRace extends App {

val sc = new java.util.Scanner (System.in)

val n = sc.nextInt()

val k = sc.nextInt()

var height = new Array[Int](n)

for(height_i <- 0 until n) {

height(height_i) = sc.nextInt()

}

val maxHeight = height.max

val beverages = if(maxHeight > k) maxHeight - k else 0

println(beverages)

}

Java

import java.util.Scanner;

public class HurdleRace {
    public static void main(String[] args) {
        Scanner stdin = new Scanner(System.in);
        int n = stdin.nextInt();
        int k = stdin.nextInt();
        int maxHeight = 0;
        for(int i = 0; i < n; i++) {
            int height = stdin.nextInt();
            if(height > maxHeight) {
                maxHeight = height;
            }
        }

        if(maxHeight > k) {
            System.out.println(maxHeight - k);
        } else {
            System.out.println(0);
        }
        stdin.close();
    }
}

import java.util.Scanner;

public class HurdleRace {

public static void main(String[] args) {

Scanner stdin = new Scanner(System.in);

int n = stdin.nextInt();

int k = stdin.nextInt();

int maxHeight = 0;

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

int height = stdin.nextInt();

if(height > maxHeight) {

maxHeight = height;

}

if(maxHeight > k) {

System.out.println(maxHeight - k);

} else {

System.out.println(0);

}

stdin.close();

}

Javascript

'use strict';

const processData = input => {
    const lines = input.split('\n');
    const [n, k] = lines[0].split(' ').map(i => parseInt(i));
    const heights = lines[1].split(' ').map(i => parseInt(i));
    let maxHeight = 0;
    heights.forEach(h => {
        maxHeight = (h > maxHeight) ? h : maxHeight;
    });

    const beverages = maxHeight > k ? (maxHeight - k) : 0;
    console.log(beverages);
};

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 [n, k] = lines[0].split(' ').map(i => parseInt(i));

const heights = lines[1].split(' ').map(i => parseInt(i));

let maxHeight = 0;

heights.forEach(h => {

maxHeight = (h > maxHeight) ? h : maxHeight;

});

const beverages = maxHeight > k ? (maxHeight - k) : 0;

console.log(beverages);

};

process.stdin.resume();

process.stdin.setEncoding("ascii");

let _input = "";

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

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

Ruby

(n, k) = gets.split.map(&:to_i)
heights = gets.split.map(&:to_i)
max_height = heights.max

beverages = 0
beverages = (max_height - k) if max_height > k

puts beverages

(n, k) = gets.split.map(&:to_i)

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

max_height = heights.max

beverages = 0

beverages = (max_height - k) if max_height > k

puts beverages

Pavol Pidanič

I can count to 1023 with 10 fingers

Hackerrank – The Hurdle Race