algorithm.md

ソート

public class Sort {
  public static void main(String... args) {
    int[] array = {8, 6, 1, 10, 4, 7, 2, 5, 3, 9};
    printArray(array);
    quickSort(array, 0, array.length - 1);
    printArray(array);

    System.out.println(fibonacci(10));
  }

  public static void printArray(int[] array) {
    System.out.print("array[");
    for(int i = 0; i < array.length; i++) {
      System.out.print(array[i]);
      if(i != array.length - 1) {
        System.out.print(", ");
      }
    }
    System.out.println("]");
  }

  public static void bubbleSort(int[] array) {
    for(int i = 0; i < array.length - 1; i++) {
      for(int j = array.length - 1; j > i; j--) {
        if(array[j - 1] > array[j]) {
          int temp = array[j - 1];
          array[j - 1] = array[j];
          array[j] = temp;
        }
      }
    }
  }

  public static void quickSort(int[] array, int left, int right) {
    if(left >= right) return;
    int pivot = array[(left + right) / 2];
    int l = left;
    int r = right;
    while(l <= r) {
      while(array[l] < pivot) l++;
      while(array[r] > pivot) r--;
      if(l <= r) {
        int temp = array[l];
        array[l] = array[r];
        array[r] = temp;
        l++;
        r--;
      }
    }
    quickSort(array, left, r);
    quickSort(array, l, right);
  }

  public static int fibonacci(int n) {
    return n <= 0 ? 0 : n == 1 ? 1 : fibonacci(n - 1) + fibonacci(n - 2);
  }
}

FizzBuzz.java

package net.ishiis.example;


import java.util.InputMismatchException;
import java.util.Scanner;

public class FizzBuzz {
    public static void main(String... args) {
        try (Scanner scanner = new Scanner(System.in)) {
            System.out.print("input: ");
            int input = scanner.nextInt();

            fizzBuzz(input);
        } catch (InputMismatchException e) {
            System.out.println("Input is not integer.");
        } catch (Exception e) {
            System.out.println("Input is exhausted.");
        }
    }

    public static void fizzBuzz(int input) {
        for (int i = 1; i <= input; i++) {
            if (i % 15 == 0) {
                System.out.println("FizzBuzz");
            } else if (i % 3 == 0) {
                System.out.println("Fizz");
            } else if (i % 5 == 0) {
                System.out.println("Buzz");
            } else {
                System.out.println(i);
            }
        }
    }
}

import java.io.*;

public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String s;
    while ((s = in.readLine()) != null) {
        Integer i = new Integer(s);
      System.out.println(i * i);
    }
  }
}

        int outputLine = new Integer(inputLines.get(0));
        inputLines.remove(0);

        inputLines.sort((a, b) -> b.length() - a.length());
        for (int i = 0; i < outputLine; i++) {
            System.out.println(inputLines.get(i));
        }