結果

問題 No.470 Inverse S+T Problem
ユーザー GrenacheGrenache
提出日時 2016-12-28 12:32:44
言語 Java21
(openjdk 21)
結果
AC  
実行時間 160 ms / 2,000 ms
コード長 6,443 bytes
コンパイル時間 3,601 ms
コンパイル使用メモリ 81,156 KB
実行使用メモリ 48,948 KB
最終ジャッジ日時 2024-06-01 22:47:50
合計ジャッジ時間 6,968 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge1
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 58 ms
38,000 KB
testcase_01 AC 48 ms
36,944 KB
testcase_02 AC 60 ms
37,572 KB
testcase_03 AC 62 ms
37,572 KB
testcase_04 AC 61 ms
37,368 KB
testcase_05 AC 60 ms
37,972 KB
testcase_06 AC 159 ms
48,896 KB
testcase_07 AC 160 ms
48,948 KB
testcase_08 AC 160 ms
48,940 KB
testcase_09 AC 59 ms
38,044 KB
testcase_10 AC 63 ms
37,948 KB
testcase_11 AC 66 ms
38,400 KB
testcase_12 AC 60 ms
38,028 KB
testcase_13 AC 61 ms
38,180 KB
testcase_14 AC 62 ms
37,968 KB
testcase_15 AC 48 ms
37,464 KB
testcase_16 AC 59 ms
37,840 KB
testcase_17 AC 62 ms
38,368 KB
testcase_18 AC 65 ms
38,200 KB
testcase_19 AC 51 ms
37,356 KB
testcase_20 AC 60 ms
38,004 KB
testcase_21 AC 61 ms
38,096 KB
testcase_22 AC 61 ms
38,020 KB
testcase_23 AC 65 ms
38,032 KB
testcase_24 AC 48 ms
37,284 KB
testcase_25 AC 49 ms
37,060 KB
testcase_26 AC 49 ms
37,368 KB
testcase_27 AC 49 ms
37,044 KB
testcase_28 AC 86 ms
40,448 KB
testcase_29 AC 74 ms
38,456 KB
testcase_30 AC 94 ms
39,440 KB
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ソースコード

diff # 

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


public class Main_yukicoder470 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		char[][] u = new char[n][];
		for (int i = 0; i < n; i++) {
			u[i] = sc.next().toCharArray();
		}

		if (n > 52) {
			pr.println("Impossible");
			return;
		}

		V = n * 2;
		edges = new ArrayList<>();
		redges = new ArrayList<>();
		for (int i = 0; i < V; i++) {
			edges.add(new ArrayList<>());
			redges.add(new ArrayList<>());
		}
		vs = new ArrayList<>();
		used = new boolean[V];
		cmp = new int[V];

		for (int i = 0; i < n; i++) {
			for (int j = i + 1; j < n; j++) {
				if (u[i][0] == u[j][0]) {
					add_edge(i, j + n);
					add_edge(j, i + n);
				}
				if (u[i][1] == u[j][1] && u[i][2] == u[j][2]) {
					add_edge(i, j + n);
					add_edge(j, i + n);
				}

				if (u[i][2] == u[j][2]) {
					add_edge(i + n, j);
					add_edge(j + n, i);
				}
				if (u[i][0] == u[j][0] && u[i][1] == u[j][1]) {
					add_edge(i + n, j);
					add_edge(j + n, i);
				}

				if (u[i][0] == u[j][2]) {
					add_edge(i, j);
					add_edge(j + n, i + n);
				}
				if (u[i][1] == u[j][0] && u[i][2] == u[j][1]) {
					add_edge(i, j);
					add_edge(j + n, i + n);
				}

				if (u[i][2] == u[j][0]) {
					add_edge(i + n, j + n);
					add_edge(j, i);
				}
				if (u[i][0] == u[j][1] && u[i][1] == u[j][2]) {
					add_edge(i + n, j + n);
					add_edge(j, i);
				}
			}
		}

		int k = scc();

		for (int i = 0; i < n; i++) {
			if (cmp[i] == cmp[i + n]) {
				pr.println("Impossible");
				return;
			}
		}

		for (int i = 0; i < n; i++) {
			if (cmp[i] > cmp[i + n]) {
				pr.printf("%c %c%c\n", u[i][0], u[i][1], u[i][2]);
			} else {
				pr.printf("%c%c %c\n", u[i][0], u[i][1], u[i][2]);
			}
		}

//		pr.printf("%.10f\n", ret);
	}

	private static int V;
	private static List<List<Integer>> edges;
	private static List<List<Integer>> redges;
	private static List<Integer> vs;
	private static boolean[] used;
	private static int[] cmp;

	private static void add_edge(int from, int to) {
		edges.get(from).add(to);
		redges.get(to).add(from);
	}

	private static void dfs(int v) {
		used[v] = true;
		for (int e : edges.get(v)) {
			if (!used[e]) {
				dfs(e);
			}
		}
		vs.add(v);
	}

	private static void rdfs(int v, int k) {
		used[v] = true;
		cmp[v] = k;
		for (int e : redges.get(v)) {
			if (!used[e]) {
				rdfs(e, k);
			}
		}
		vs.add(v);
	}

	private static int scc() {
		Arrays.fill(used, false);
		vs.clear();
		for (int v = 0; v < V; v++) {
			if (!used[v]) {
				dfs(v);
			}
		}

		Arrays.fill(used, false);
		int k = 0;
		for (int i = vs.size() - 1; i >= 0; i--) {
			if (!used[vs.get(i)]) {
				rdfs(vs.get(i), k++);
			}
		}

		return k;
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	@SuppressWarnings("unused")
	private static class Scanner {
		BufferedReader br;

		Scanner (InputStream in) {
			br = new BufferedReader(new InputStreamReader(in));
		}

		private boolean isPrintable(int ch) {
			return ch >= '!' && ch <= '~';
		}

		private boolean isCRLF(int ch) {
			return ch == '\n' || ch == '\r' || ch == -1;
		}

		private int nextPrintable() {
			try {
				int ch;
				while (!isPrintable(ch = br.read())) {
					if (ch == -1) {
						throw new NoSuchElementException();
					}
				}

				return ch;
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		String next() {
			try {
				int ch = nextPrintable();
				StringBuilder sb = new StringBuilder();
				do {
					sb.appendCodePoint(ch);
				} while (isPrintable(ch = br.read()));

				return sb.toString();
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		int nextInt() {
			try {
				// parseInt from Integer.parseInt()
				boolean negative = false;
				int res = 0;
				int limit = -Integer.MAX_VALUE;
				int radix = 10;

				int fc = nextPrintable();
				if (fc < '0') {
					if (fc == '-') {
						negative = true;
						limit = Integer.MIN_VALUE;
					} else if (fc != '+') {
						throw new NumberFormatException();
					}
					fc = br.read();
				}
				int multmin = limit / radix;

				int ch = fc;
				do {
					int digit = ch - '0';
					if (digit < 0 || digit >= radix) {
						throw new NumberFormatException();
					}
					if (res < multmin) {
						throw new NumberFormatException();
					}
					res *= radix;
					if (res < limit + digit) {
						throw new NumberFormatException();
					}
					res -= digit;

				} while (isPrintable(ch = br.read()));

				return negative ? res : -res;
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		long nextLong() {
			try {
				// parseLong from Long.parseLong()
				boolean negative = false;
				long res = 0;
				long limit = -Long.MAX_VALUE;
				int radix = 10;

				int fc = nextPrintable();
				if (fc < '0') {
					if (fc == '-') {
						negative = true;
						limit = Long.MIN_VALUE;
					} else if (fc != '+') {
						throw new NumberFormatException();
					}
					fc = br.read();
				}
				long multmin = limit / radix;

				int ch = fc;
				do {
					int digit = ch - '0';
					if (digit < 0 || digit >= radix) {
						throw new NumberFormatException();
					}
					if (res < multmin) {
						throw new NumberFormatException();
					}
					res *= radix;
					if (res < limit + digit) {
						throw new NumberFormatException();
					}
					res -= digit;

				} while (isPrintable(ch = br.read()));

				return negative ? res : -res;
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		float nextFloat() {
			return Float.parseFloat(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			try {
				int ch;
				while (isCRLF(ch = br.read())) {
					if (ch == -1) {
						throw new NoSuchElementException();
					}
				}
				StringBuilder sb = new StringBuilder();
				do {
					sb.appendCodePoint(ch);
				} while (!isCRLF(ch = br.read()));

				return sb.toString();
			} catch (IOException e) {
				throw new NoSuchElementException();
			}
		}

		void close() {
			try {
				br.close();
			} catch (IOException e) {
//				throw new NoSuchElementException();
			}
		}
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}
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