网易2017校招编程题

小易去买苹果,有两种包装,一种一袋8个,一种一袋6个,小易要买n个苹果(不能多也不能少),输出袋子最少的购买方案,如无法正好买到n个,则输出-1.

public class BuyApple {
  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    System.out.print("输入一个整数:");
    int n = input.nextInt();
    int[] min = buyApple(n);
    if(min[0] == n){
    System.out.println(-1);
    }else{
    System.out.println("最少需要"+min[0]+"袋,其中:8个苹果"+min[1]+"袋、6个苹果"+min[2]+"袋");
  }
}

    public static int[] buyApple(int n) {
      int min = n;
      int[] results = {n,0,0};//总袋数,8个的袋数,6个的袋数
      if(n%8 == 0){
      results[0] = n/8;
      results[1] = n/8;
      }else if(n%6 == 0){
         if(n/6 < results[0]){
          results[0] = n / 6;
          results[1] = n / 6;
         }
      }else{
        for(int i = 0; i <= n/8; ++i){
          if((n-8*i)%6 == 0){
            if((n-8*i)/6 + i < min){
              results[0] = (n-8*i)/6 + i;
              results[1] = i;
              results[2] = (n-8*i)/6;
            }
          }
        }
      }  
    return results;
    }
}

posted on 2017-02-22 13:13  蒋闯  阅读(431)  评论(0编辑  收藏  举报