結果

問題 No.2290 UnUnion Find
ユーザー watarimaycry2watarimaycry2
提出日時 2023-06-08 21:54:27
言語 Java21
(openjdk 21)
結果
AC  
実行時間 1,063 ms / 2,000 ms
コード長 5,758 bytes
コンパイル時間 2,795 ms
コンパイル使用メモリ 84,696 KB
実行使用メモリ 117,752 KB
最終ジャッジ日時 2024-06-10 00:46:21
合計ジャッジ時間 45,274 ms
ジャッジサーバーID
（参考情報） 		judge4 / 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 49 ms
50,332 KB
testcase_01 AC 48 ms
50,592 KB
testcase_02 AC 561 ms
80,608 KB
testcase_03 AC 752 ms
97,676 KB
testcase_04 AC 793 ms
92,660 KB
testcase_05 AC 807 ms
101,548 KB
testcase_06 AC 786 ms
102,588 KB
testcase_07 AC 791 ms
90,216 KB
testcase_08 AC 805 ms
101,500 KB
testcase_09 AC 783 ms
100,152 KB
testcase_10 AC 809 ms
100,940 KB
testcase_11 AC 770 ms
102,020 KB
testcase_12 AC 777 ms
101,216 KB
testcase_13 AC 791 ms
101,280 KB
testcase_14 AC 787 ms
101,256 KB
testcase_15 AC 803 ms
102,068 KB
testcase_16 AC 810 ms
101,088 KB
testcase_17 AC 817 ms
103,100 KB
testcase_18 AC 799 ms
101,812 KB
testcase_19 AC 829 ms
101,920 KB
testcase_20 AC 1,063 ms
117,752 KB
testcase_21 AC 651 ms
91,812 KB
testcase_22 AC 751 ms
95,620 KB
testcase_23 AC 771 ms
95,524 KB
testcase_24 AC 936 ms
104,164 KB
testcase_25 AC 749 ms
91,208 KB
testcase_26 AC 971 ms
115,704 KB
testcase_27 AC 900 ms
110,720 KB
testcase_28 AC 805 ms
99,820 KB
testcase_29 AC 847 ms
103,684 KB
testcase_30 AC 653 ms
88,660 KB
testcase_31 AC 810 ms
101,700 KB
testcase_32 AC 747 ms
91,904 KB
testcase_33 AC 798 ms
99,636 KB
testcase_34 AC 1,038 ms
117,432 KB
testcase_35 AC 946 ms
112,244 KB
testcase_36 AC 753 ms
91,996 KB
testcase_37 AC 800 ms
98,752 KB
testcase_38 AC 742 ms
92,468 KB
testcase_39 AC 750 ms
96,716 KB
testcase_40 AC 849 ms
102,036 KB
testcase_41 AC 766 ms
92,236 KB
testcase_42 AC 846 ms
101,052 KB
testcase_43 AC 818 ms
103,024 KB
testcase_44 AC 794 ms
101,824 KB
testcase_45 AC 822 ms
99,832 KB
testcase_46 AC 808 ms
99,396 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 # 

import java.util.*; import java.io.*; import java.math.*;
public class Main{
	//見なくていいよ　ここから------------------------------------------
	static class InputIterator{
		ArrayList<String> inputLine = new ArrayList<>(1024);
		int index = 0; int max; String read;
		InputIterator(){
			try{
				BufferedReader br = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
				while((read = br.readLine()) != null){
					inputLine.addAll(Arrays.asList(read.split(" ")));
				}
			}catch(IOException e){}
			max = inputLine.size();
		}
		boolean hasNext(){return (index < max);}
		String next(){
			if(hasNext()){
				return inputLine.get(index++);
			}else{
				throw new IndexOutOfBoundsException("There is no more input");
			}
		}
	}
	static HashMap<Integer, String> CONVSTR = new HashMap<>();
	static InputIterator ii = new InputIterator();//This class cannot be used in reactive problem.
	static PrintWriter out = new PrintWriter(System.out);
	static void flush(){out.flush();}
	static void myout(Object t){out.println(t);}
	static void myerr(Object... t){System.err.print("debug:");System.err.println(Arrays.deepToString(t));}
	static String next(){return ii.next();}
	static boolean hasNext(){return ii.hasNext();}
	static int nextInt(){return Integer.parseInt(next());}
	static long nextLong(){return Long.parseLong(next());}
	static double nextDouble(){return Double.parseDouble(next());}
	static ArrayList<String> nextCharArray(){return myconv(next(), 0);}
	static ArrayList<String> nextStrArray(int size){
		ArrayList<String> ret = new ArrayList<>(size);
		for(int i = 0; i < size; i++){
			ret.add(next());
		}
		return ret;
	}
	static ArrayList<Integer> nextIntArray(int size){
		ArrayList<Integer> ret = new ArrayList<>(size);
		for(int i = 0; i < size; i++){
			ret.add(Integer.parseInt(next()));
		}
		return ret;
	}
	static ArrayList<Long> nextLongArray(int size){
		ArrayList<Long> ret = new ArrayList<>(size);
		for(int i = 0; i < size; i++){
			ret.add(Long.parseLong(next()));
		}
		return ret;
	}
	@SuppressWarnings("unchecked")
	static String myconv(Object list, int no){//only join
		StringBuilder sb = new StringBuilder("");
		String joinString = CONVSTR.get(no);
		if(list instanceof String[]){
			return String.join(joinString, (String[])list);
		}else if(list instanceof long[]){
			long[] tmp = (long[])list;
			if(tmp.length == 0){
				return "";
			}
			sb.append(String.valueOf(tmp[0]));
			for(int i = 1; i < tmp.length; i++){
				sb.append(joinString).append(String.valueOf(tmp[i]));
			}
			return sb.toString();
		}else if(list instanceof int[]){
			int[] tmp = (int[])list;
			if(tmp.length == 0){
				return "";
			}
			sb.append(String.valueOf(tmp[0]));
			for(int i = 1; i < tmp.length; i++){
				sb.append(joinString).append(String.valueOf(tmp[i]));
			}
			return sb.toString();
		}else if(list instanceof ArrayList){
			ArrayList tmp = (ArrayList)list;
			if(tmp.size() == 0){
				return "";
			}
			sb.append(tmp.get(0));
			for(int i = 1; i < tmp.size(); i++){
				sb.append(joinString).append(tmp.get(i));
			}
			return sb.toString();
		}else{
			throw new ClassCastException("Don't join");
		}
	}
	static ArrayList<String> myconv(String str, int no){//only split
		String splitString = CONVSTR.get(no);
		return new ArrayList<String>(Arrays.asList(str.split(splitString)));
	}
	static ArrayList<String> myconv(String str, String no){
		return new ArrayList<String>(Arrays.asList(str.split(no)));
	}
	public static void main(String[] args){
		CONVSTR.put(8, " "); CONVSTR.put(9, "\n"); CONVSTR.put(0, "");
		solve();flush();
	}
	//見なくていいよ　ここまで------------------------------------------
	//このコードをコンパイルするときは、「-encoding UTF-8」を指定すること
	static void solve(){//ここがメイン関数
		int N = nextInt();
		UnionFind uf = new UnionFind(N);
		TreeSet<Integer> set = new TreeSet<>();
		for(int i = 0; i < N; i++){
			set.add(i);
		}
		int Q = nextInt();
		for(int i = 0; i < Q; i++){
			int t = nextInt();
			if(t == 1){
				int L = nextInt() - 1;
				int R = nextInt() - 1;
				int p1 = uf.getRootIndex(L);
				int p2 = uf.getRootIndex(R);
				uf.doUnion(L, R);
				if(p1 != uf.getRootIndex(L)){
					set.remove(p1);
				}
				if(p2 != uf.getRootIndex(R)){
					set.remove(p2);
				}
			}else{
				int V = nextInt() - 1;
				if(set.size() == 1){
					myout("-1");
				}else{
					int p = uf.getRootIndex(V);
					if(set.first() == p){
						myout(set.last() + 1);
					}else{
						myout(set.first() + 1);
					}
				}
			}
		}
	}
	//メソッド追加エリア　ここから

//UnionFind
static class UnionFind{
    int[] list;
    int group;
    UnionFind(int size){
        list = new int[size];
        Arrays.fill(list, -1);
        group = size;
    }
    boolean isSame(int L, int R){
        return getRootIndex(L) == getRootIndex(R);
    }
    int getRootIndex(int index){
        if(list[index] < 0){
            return index;
        }else{
            list[index] = getRootIndex(list[index]);
            return list[index];
        }
    }
    void doUnion(int L, int R){
        int Lroot = getRootIndex(L);
        int Rroot = getRootIndex(R);
        if(Lroot != Rroot){
            group--;
            if(getSize(Lroot) >= getSize(Rroot)){
                int tmp = Lroot;
                Lroot = Rroot;
                Rroot = tmp;
            }
            list[Lroot] += list[Rroot];
            list[Rroot] = Lroot;
        }
    }
    int getSize(int index){
        return -list[getRootIndex(index)];
    }
    int getGroupCount(){
        return group;
    }
    boolean isRoot(int index){
        return getRootIndex(index) == index;
    }
}


	//メソッド追加エリア　ここまで
}
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