#172161 (Java) No.515 典型LCP

• 問題: No.515 典型LCP
• ユーザー: 37zigen
• 提出日時: 2017-05-06 06:26:10
• 言語: Java (openjdk 23)
• 結果: TLE (最新)
  AC
  (最初)
• 実行時間: -
• コード長: 6,600 bytes
• コンパイル時間: 2,776 ms
• コンパイル使用メモリ: 83,076 KB
• 実行使用メモリ: 301,056 KB
• 最終ジャッジ日時: 2024-09-14 13:23:24
• 合計ジャッジ時間: 15,553 ms
• ジャッジサーバーID （参考情報）: judge3 / judge1

ファイルパターン	結果
sample	AC * 2
other	AC * 10 TLE * 5

ソースコード

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;

public class Main {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	int N, M;
	int[] X, Y;
	int[] pow2 = new int[30];

	void solve() {
		for (int i = 0; i < pow2.length; ++i) {
			pow2[i] = 1 << i;
		}
		long N = nl();
		String[] s = new String[(int) N];
		TrieByList trie = new TrieByList((int) N);
		long t = System.currentTimeMillis();
		for (int i = 0; i < N; ++i) {
			s[i] = ns();
			trie.add(s[i].toCharArray(), i);
		}
		trie.preLca();
		SparseTable st = new SparseTable(trie.A);
		long M = nl();
		long x = nl();
		long d = nl();
		long ans = 0;
		long nn = N * (N - 1);
		int di = (int) (d / (N - 1));
		int dj = (int) (d % (N - 1));
		int ii = (int) (x / (N - 1));
		int jj = (int) (x % (N - 1));
		for (int k = 0; k < M; ++k) {
			int i = ii;
			int j = jj;
			if (i > j) {
				int tmp = i;
				i = j;
				j = tmp;
			} else {
				j = j + 1;
			}
			jj += dj;
			if (jj >= N - 1) {
				jj -= N - 1;
				++ii;
			}
			ii += di;
			if (ii >= N) {
				ii -= N;
			}
			if (trie.pos[trie.rev[i]] > trie.pos[trie.rev[j]]) {
				int tmp = i;
				i = j;
				j = tmp;
			}
			ans += st.query(trie.pos[trie.rev[i]], trie.pos[trie.rev[j]] + 1);
		}

		out.println(ans);
		System.err.println(System.currentTimeMillis() - t);
	}

	class SparseTable {
		int[][] t;

		public SparseTable(int[] A) {
			int N = A.length;
			t = new int[f(N) + 1][];
			t[0] = new int[(int) N];
			for (int i = 0; i < N; ++i) {
				t[0][i] = A[i];
			}
			for (int i = 1; i < t.length; ++i) {
				int p = N - pow2[i];
				t[i] = new int[p];
				for (int j = 0; j < p; ++j) {
					t[i][j] = Math.min(t[i - 1][j], t[i - 1][j + pow2[i - 1]]);
				}
			}
		}

		int query(int l, int r) {
			int a = f(r - l);
			return Math.min(t[a][l], t[a][r - pow2[a]]);
		}

	}

	// 1<<v<=cielとなるv
	int f(int ciel) {
		int h = 25;
		int l = 0;
		while (h - l > 1) {
			int m = (h + l) / 2;
			if (pow2[m] <= ciel) {
				l = m;
			} else {
				h = m;
			}
		}
		return l;
	}

	class TrieByList {
		Node root = new Node(0, (char) -1);
		int gen = 1;
		int[] A;
		int[] pos;
		int[] rev;

		public TrieByList(int N) {
			rev = new int[N];
			Arrays.fill(rev, -1);
		}

		class Node {
			int id;
			char c;
			Node[] child = null;
			int ptn = 0;
			int p = 0;
			int hit = 0;
			int depth = -Integer.MAX_VALUE / 16;

			public Node(int id, char c) {
				this.id = id;
				this.c = c;
			}

			Node search(char c) {
				if (ptn << 31 - (c - 'a') < 0) {
					return child[Integer.bitCount(ptn << 31 - (c - 'a')) - 1];
				} else {
					return null;
				}
			}

			void append(Node n) {
				if (p == 0) {
					child = new Node[1];
				} else if (p + 1 > child.length) {
					child = Arrays.copyOf(child, child.length * 2);
				}
				int zind = Integer.bitCount(ptn << 31 - (n.c - 'a'));
				System.arraycopy(child, zind, child, zind + 1, p - zind);
				child[zind] = n;
				ptn |= 1 << (n.c - 'a');
				++p;
			}
		}

		void add(char[] s, int id) {
			Node pre = null;
			Node cur = root;
			for (char c : s) {
				pre = cur;
				cur = pre.search(c);
				if (cur == null) {
					cur = new Node(gen++, c);
					pre.append(cur);
				}
			}
			++cur.hit;
			rev[id] = cur.id;
		}

		void preLca() {
			A = new int[2 * gen];
			pos = new int[gen];
			Arrays.fill(pos, -1);
			root.depth = 0;
			dfs(root);
		}

		int tmp = 0;

		void dfs(Node cur) {
			if (pos[cur.id] == -1) {
				pos[cur.id] = tmp;
			}
			A[tmp++] = cur.depth;
			for (int i = 0; i < cur.p; ++i) {
				// A[tmp++] = cur.depth;
				cur.child[i].depth = cur.depth + 1;
				dfs(cur.child[i]);
				A[tmp++] = cur.depth;
			}
			// A[tmp++] = cur.depth;
		}
	}

	void run() throws Exception {
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);

		long s = System.currentTimeMillis();
		solve();
		out.flush();
		if (!INPUT.isEmpty())
			tr(System.currentTimeMillis() - s + "ms");
		// Thread t = new Thread(null, null, "~",
		// Runtime.getRuntime().maxMemory()){
		// @Override
		// public void run() {
		// long s = System.currentTimeMillis();
		// solve();
		// out.flush();
		// if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
		// }
		// };
		// t.start();
		// t.join();
	}

	public static void main(String[] args) throws Exception {
		new Main().run();
	}

	private byte[] inbuf = new byte[1024];
	public int lenbuf = 0, ptrbuf = 0;

	private int readByte() {
		if (lenbuf == -1)
			throw new InputMismatchException();
		if (ptrbuf >= lenbuf) {
			ptrbuf = 0;
			try {
				lenbuf = is.read(inbuf);
			} catch (IOException e) {
				throw new InputMismatchException();
			}
			if (lenbuf <= 0)
				return -1;
		}
		return inbuf[ptrbuf++];
	}

	private boolean isSpaceChar(int c) {
		return !(c >= 33 && c <= 126);
	}

	private int skip() {
		int b;
		while ((b = readByte()) != -1 && isSpaceChar(b))
			;
		return b;
	}

	private double nd() {
		return Double.parseDouble(ns());
	}

	private char nc() {
		return (char) skip();
	}

	private String ns() {
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while (!(isSpaceChar(b))) { // when nextLine, (isSpaceChar(b) && b != '
									// ')
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}

	private char[] ns(int n) {
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while (p < n && !(isSpaceChar(b))) {
			buf[p++] = (char) b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}

	private int[] na(int n) {
		int[] a = new int[n];
		for (int i = 0; i < n; i++)
			a[i] = ni();
		return a;
	}

	private long[] nal(int n) {
		long[] a = new long[n];
		for (int i = 0; i < n; i++)
			a[i] = nl();
		return a;
	}

	private char[][] nm(int n, int m) {
		char[][] map = new char[n][];
		for (int i = 0; i < n; i++)
			map[i] = ns(m);
		return map;
	}

	private int[][] nmi(int n, int m) {
		int[][] map = new int[n][];
		for (int i = 0; i < n; i++)
			map[i] = na(m);
		return map;
	}

	private int ni() {
		return (int) nl();
	}

	private long nl() {
		long num = 0;
		int b;
		boolean minus = false;
		while ((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'))
			;
		if (b == '-') {
			minus = true;
			b = readByte();
		}

		while (true) {
			if (b >= '0' && b <= '9') {
				num = num * 10 + (b - '0');
			} else {
				return minus ? -num : num;
			}
			b = readByte();
		}
	}

	private static void tr(Object... o) {
		System.out.println(Arrays.deepToString(o));
	}
}