結果

問題 No.160 最短経路のうち辞書順最小
ユーザー yun_appyun_app
提出日時 2016-05-10 15:46:21
言語 Java21
(openjdk 21)
結果
AC  
実行時間 1,025 ms / 5,000 ms
コード長 3,772 bytes
コンパイル時間 2,870 ms
コンパイル使用メモリ 81,588 KB
実行使用メモリ 61,492 KB
最終ジャッジ日時 2024-10-05 13:30:21
合計ジャッジ時間 9,325 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge5
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 62 ms
50,772 KB
testcase_01 AC 62 ms
50,648 KB
testcase_02 AC 62 ms
50,728 KB
testcase_03 AC 64 ms
50,720 KB
testcase_04 AC 174 ms
55,244 KB
testcase_05 AC 207 ms
56,100 KB
testcase_06 AC 238 ms
56,264 KB
testcase_07 AC 160 ms
55,236 KB
testcase_08 AC 163 ms
55,008 KB
testcase_09 AC 150 ms
55,132 KB
testcase_10 AC 167 ms
55,004 KB
testcase_11 AC 170 ms
55,416 KB
testcase_12 AC 164 ms
55,088 KB
testcase_13 AC 153 ms
54,844 KB
testcase_14 AC 178 ms
55,192 KB
testcase_15 AC 160 ms
54,836 KB
testcase_16 AC 157 ms
54,844 KB
testcase_17 AC 168 ms
54,988 KB
testcase_18 AC 146 ms
54,844 KB
testcase_19 AC 153 ms
55,288 KB
testcase_20 AC 144 ms
55,504 KB
testcase_21 AC 158 ms
54,852 KB
testcase_22 AC 159 ms
55,252 KB
testcase_23 AC 152 ms
55,140 KB
testcase_24 AC 162 ms
55,328 KB
testcase_25 AC 148 ms
55,156 KB
testcase_26 AC 156 ms
54,960 KB
testcase_27 AC 82 ms
51,280 KB
testcase_28 AC 1,025 ms
61,492 KB
testcase_29 AC 86 ms
50,624 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    public static void main (String[] args) throws java.lang.Exception
    {
        // your code goes here
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String[] lines = br.readLine().split(" ");
        int n = Integer.parseInt(lines[0]);
        int m = Integer.parseInt(lines[1]);
        int s = Integer.parseInt(lines[2]);
        int g = Integer.parseInt(lines[3]);
        
        ArrayList<Station> stations = new ArrayList<Station>();
        for(int i=0;i<n;i++){
            stations.add(new Station(i));
        }
        stations.get(s).min_cost = 0;
        stations.get(s).min_route.add(s);
        
        for(int i=0;i<m;i++){
            lines = br.readLine().split(" ");
            int a = Integer.parseInt(lines[0]);
            int b = Integer.parseInt(lines[1]);
            int c = Integer.parseInt(lines[2]);
            stations.get(a).addNext(stations.get(b),c);
            stations.get(b).addNext(stations.get(a),c);
        }
        PriorityQueue<Station> queue = new PriorityQueue<Station>(200,(a,b)->a.compare(b));
        queue.add(stations.get(s));
        while(queue.size()!=0){
            Station sta = queue.poll();
            for(Route route:sta.next){
                Station clone = sta.clone();
                clone.min_route.add(route.station.no);
                clone.min_cost += route.cost;
                if(clone.compare(route.station) < 0){
                    route.station.min_route = new ArrayList<Integer>(clone.min_route);
                    route.station.min_cost = clone.min_cost;
                    queue.add(route.station);
                }
            }
        }
        System.out.println(stations.get(g).toString());
    }
    
    public static class Station{
        public ArrayList<Route> next = new ArrayList<Route>();
        
        public int no;
        public int min_cost = Integer.MAX_VALUE;
        public ArrayList<Integer> min_route = new ArrayList<Integer>();
        
        public Station(int no){
            this.no = no;
        }
        public void addNext(Station station,int cost){
            next.add(new Route(station,cost));
        }
        public int compare(Station target){
            if(this.min_cost != target.min_cost){
                return this.min_cost - target.min_cost;
            }else{
                int n = Math.min(this.min_route.size(),target.min_route.size());
                for(int i=0;i<n;i++){
                    if(this.min_route.get(i) != target.min_route.get(i)){
                        return this.min_route.get(i) - target.min_route.get(i);
                    }
                }
            }
            return 0;
        }
        public Station clone(){
            Station new_obj = new Station(this.no);
            new_obj.min_cost = this.min_cost;
            new_obj.min_route = new ArrayList<Integer>(this.min_route);
            new_obj.next = this.next;   //ディープコピーしなくてもOK
            return new_obj;
        }
        
        public String toString(){
            StringBuilder sb = new StringBuilder();
            for(int route:min_route){
                if(sb.length() != 0){
                    sb.append(" ");
                }
                sb.append(route);
            }
            return sb.toString();
        }
    }
    public static class Route{
        public Station station;
        public int cost;
        public Route(Station station,int cost){
            this.station = station;
            this.cost = cost;
        }
    }
}
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