Question

当我点击提交按钮时，没有任何事情发生

我的代码：

import java.awt.Point;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Scanner;
import java.util.StringTokenizer;




class TestClass {

static int cost;
static int m;
static int dp[][];
static int graph[][];
static int vis[][];
static int first[];
static boolean fin;



public static class Batman{

    int to ;
    int from ;
    int d;

    public Batman(int to , int from , int d){
        this.to = to;
        this.from = from;
        this.d =d;
    }
}

public static int find(int x , int[] p){

    if(p[x]==x) return x;
    return find(p[x], p);
}

public static void union(int x , int y , int[] size , int[] p){

    if(size[x]>size[y]){
        p[y]=x;
        size[x]++;

    }else{
        p[x]=y;
        size[y]++;
    }

}

public static void main(String args[] ) throws IOException  {



    InputStream inputStream = System.in;
    InputReader in = new InputReader(inputStream);
//Scanner in = new Scanner(new InputStreamReader(System.in));

int n = in.nextInt();
int[] Parent = new int[n];
int[] Size= new int[n];
for(int i=0;i<n;i++){
    Parent[i]=i;
    Size[i]=1;
}
Batman[] trees = new Batman[n-1];
int min =Integer.MAX_VALUE;
int dd=0;
for(int i=0;i<n-1;i++){ 
    int xx = in.nextInt()-1;
    int yy = in.nextInt()-1;
    int d =in.nextInt();
    trees[i] = new Batman(xx, yy, d);
    if(xx==0 && min>d)
    {
        min = d;
        dd=yy;
    }

    if(yy==0 && min>d){

       min =d;
       dd=xx;
    }
    }


    Arrays.sort(trees, new Comparator<Batman>() {

        public int compare(Batman a, Batman b) {
            // TODO Auto-generated method stub
            return a.d-b.d;
        }
    });
    int ans=0;
    if(min!=Integer.MAX_VALUE){
        ans=min;
    Parent[dd]=0;
    Size[0]+=1;
    }


    for(int i=0;i<n-1;i++){

        int xx = find(trees[i].from,Parent);
        int yy = find(trees[i].to,Parent);

        if(xx!=yy){
            ans+=trees[i].d;
            union(xx, yy, Size,Parent);

        }
    }

    System.out.println(ans);


}
 }
class InputReader {
    public BufferedReader reader;
    public StringTokenizer tokenizer;

    public InputReader(InputStream stream) {
        reader = new BufferedReader(new InputStreamReader(stream), 32768);
        tokenizer = null;
    }

    public String next() {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(reader.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }

    public int nextInt() {
        return Integer.parseInt(next());
    }
    public long nextLong(){
        return Long.parseLong(next());
    }

}

示例输入：

问题出在哪里？同样的事情当我尝试提交此Problem的解决方案时，当我点击提交按钮没有任何反应时发生

Answer 1

必须遵循示例程序中的指导原则：

/* 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
    }
}

确保选择了正确的语言（例如Java或Java7）。此外，请确保您也正确输入输入：

在最后一行之后应该有一个下一行字符。

这是a working version。

无法向Ideone提交代码

1 个答案: