酒店价格

 1 import java.util.ArrayList;
 2 import java.util.List;
 3 import java.util.Scanner;
 4 /**
 5  * 
 6  *  酒店价格
 7  *    把每天的价格 都放进一个数组里
 8  *    遍历
 9  * @author Dell
10  *
11  */
12 public class Main {
13 static public int[][] merge(int[][] datRangePrices){
14     int maxDay = Integer.MIN_VALUE;
15     int minDay = Integer.MAX_VALUE;
16     //  天数范围
17     for (int i = 0; i < datRangePrices.length; i++) {
18     
19             if (datRangePrices[i][1]>maxDay) {
20                 maxDay=datRangePrices[i][1];
21             }
22             if (datRangePrices[i][0]<minDay) {
23                 minDay = datRangePrices[i][0];
24             }    
25     }
26     //  构造各天价格数组
27     int [] dayPrice = new int[maxDay+1];//要求下标对应天数 需要加一
28     // 初始化
29     for (int i = 0; i < dayPrice.length; i++) {
30         dayPrice[i]=0;
31     }
32     //  价格赋值
33     for (int i = 0; i < datRangePrices.length; i++) {
34         for (int j = datRangePrices[i][0]; j<=datRangePrices[i][1]; j++) {
35             dayPrice[j]=datRangePrices[i][2];
36         }
37     }
38     List<int[]> l = new ArrayList<>();
39     // 装入 第一天  minDay
40     int curPrice = dayPrice[minDay];
41     int startDay = minDay;
42     int endDay = minDay;
43     // 从第二天循环
44     for (int i = minDay+1; i < dayPrice.length; i++) {
45         if (dayPrice[i]==0) {
46             continue;
47         }
48         if (dayPrice[i]==curPrice) {
49             endDay++;
50         }else {
51             l.add(new int[]{startDay,endDay,curPrice});
52             startDay = i;
53             endDay = i;
54             curPrice = dayPrice[i];
55         }
56     }
57     //  最后一个是跳出循环 需要处理
58     endDay = maxDay;
59         l.add(new int[]{startDay,endDay,curPrice});
60     int res[][] = new int [l.size()][3];
61     for (int i = 0; i < res.length; i++) {
62         res[i] = l.get(i);
63     }
64     return res;
65 } 
66 public static void main(String[] args) {
67 Scanner sc = new Scanner(System.in);
68 List<int[]> list = new ArrayList();
69 while (sc.hasNextInt()) {  //   按  Ctrl + z 结束输入
70     int[] p = new int[3]; 
71          p[0]=sc.nextInt();
72          p[1]=sc.nextInt();
73          p[2] = sc.nextInt();
74          list.add(p);
75     }
76     int[][] price = new int[list.size()][3];
77     price = list.toArray(price);//  将list里的数组转化进price toArray() 会得到object[]会导致转型失败 toArray(price) 里使用泛型可以转型
78     int res[][] = merge(price);
79 //    int res[][] = merge(new int[][] {{1,1,100},{2,3,100},{4,5,110}});
80     String string = "";
81     for (int i = 0; i < res.length; i++) {
82         string+="["+res[i][0]+", "+res[i][1]+", "+res[i][2]+"],";
83     }
84     string = string.substring(0,string.length()-1);
85     System.out.println(string);
86 }
87 }