HackerrankPsAlgorithms0027.java

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class HackerrankPsAlgorithms0027 {
	// The Hurdle Race
	// https://www.hackerrank.com/challenges/the-hurdle-race/problem?isFullScreen=true

	// --- You need to fill this method ---
	public static int hurdleRace(int k, List<Integer> height) {
		int maxLength = height.stream().mapToInt(Integer::intValue).max().orElse(0);
		return maxLength > k ? maxLength - k : 0;
	}

	public static void main(String[] args) throws IOException {
		BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

		String[] firstMultipleInput = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");

		int n = Integer.parseInt(firstMultipleInput[0]);

		int k = Integer.parseInt(firstMultipleInput[1]);

		List<Integer> height = Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))
				.map(Integer::parseInt)
				.collect(Collectors.toList());

		int result = hurdleRace(k, height);

		bufferedWriter.write(String.valueOf(result));
		bufferedWriter.newLine();

		bufferedReader.close();
		bufferedWriter.close();
	}

}