oj.uz

Submission #274571

# Submission time Handle Problem Language Result Execution time Memory
274571 2020-08-19T12:51:18 Z Gilgamesh Collecting Stamps 3 (JOI20_ho_t3) Java 11
15 / 100
 2000 ms 123184 KB 
import java.util.*;
import java.io.*;

public class ho_t3 {
	final static int MOD = 1000000007;
	final static int intMax = 1000000000;
	final static int intMin = -1000000000;
	final static int[] dx = { 0, 0, -1, 1 };
	final static int[] dy = { -1, 1, 0, 0 };

	static int T;

	static class Reader {
		final private int BUFFER_SIZE = 1 << 16;
		private DataInputStream din;
		private byte[] buffer;
		private int bufferPointer, bytesRead;

		public Reader() {
			din = new DataInputStream(System.in);
			buffer = new byte[BUFFER_SIZE];
			bufferPointer = bytesRead = 0;
		}

		public Reader(String file_name) throws IOException {
			din = new DataInputStream(new FileInputStream(file_name));
			buffer = new byte[BUFFER_SIZE];
			bufferPointer = bytesRead = 0;
		}

		public String readLine() throws IOException {
			byte[] buf = new byte[360]; // line length
			int cnt = 0, c;
			while ((c = read()) != -1) {
				if (c == '\n')
					break;
				buf[cnt++] = (byte) c;
			}
			return new String(buf, 0, cnt);
		}

		public int nextInt() throws IOException {
			int ret = 0;
			byte c = read();
			while (c <= ' ')
				c = read();
			boolean neg = (c == '-');
			if (neg)
				c = read();
			do {
				ret = ret * 10 + c - '0';
			} while ((c = read()) >= '0' && c <= '9');

			if (neg)
				return -ret;
			return ret;
		}

		public long nextLong() throws IOException {
			long ret = 0;
			byte c = read();
			while (c <= ' ')
				c = read();
			boolean neg = (c == '-');
			if (neg)
				c = read();
			do {
				ret = ret * 10 + c - '0';
			} while ((c = read()) >= '0' && c <= '9');
			if (neg)
				return -ret;
			return ret;
		}

		public double nextDouble() throws IOException {
			double ret = 0, div = 1;
			byte c = read();
			while (c <= ' ')
				c = read();
			boolean neg = (c == '-');
			if (neg)
				c = read();

			do {
				ret = ret * 10 + c - '0';
			} while ((c = read()) >= '0' && c <= '9');

			if (c == '.') {
				while ((c = read()) >= '0' && c <= '9') {
					ret += (c - '0') / (div *= 10);
				}
			}

			if (neg)
				return -ret;
			return ret;
		}

		private void fillBuffer() throws IOException {
			bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE);
			if (bytesRead == -1)
				buffer[0] = -1;
		}

		private byte read() throws IOException {
			if (bufferPointer == bytesRead)
				fillBuffer();
			return buffer[bufferPointer++];
		}

		public void close() throws IOException {
			if (din == null)
				return;
			din.close();
		}
	}
	
	static long min(long a, long b) {
		return a < b ? a : b;
	}
	
	public static void main(String[] args) throws Exception {
		Reader in = new Reader();
		int N = in.nextInt();
		int L = in.nextInt();
		int[] X = new int[N + 1];
		int[] X2 = new int[N + 1];
		int[] T = new int[N];
		for(int i = 1; i <= N; ++i) {
			X[i] = in.nextInt();
		}
		for(int i = 0; i < N; ++i) {
			T[i] = in.nextInt();
		}
		for(int i = N; i >= 1; --i) {
			X2[N - i + 1] = L - X[i];
		}
		long[][][][] dp = new long[N + 1][N + 1][N + 1][2]; //dp[i][j][k][l] = min time to i stamps, j left, k right, l = 0 last left, 1 last right
		for(int i = 0; i <= N; ++i) {
			for(int j = 0; j <= N; ++j) {
				for(int k = 0; k <= N; ++k) {
					dp[i][j][k][0] = Long.MAX_VALUE / 2;
					dp[i][j][k][1] = Long.MAX_VALUE / 2;
				}
			}
		}
		dp[0][0][0][0] = 0;
		dp[0][0][0][1] = 0;
		int ans = 0;
		for(int i = 0; i <= N; ++i) {
			for(int j = 0; j <= N; ++j) {
				for(int k = 0; k <= N; ++k) {
					if(j + k > N || j + k < i) continue;
					if(j > 0) {
						//transition from dp[i - 1][j - 1][k][0], dp[i - 1][j - 1][k][1], dp[i][j - 1][k][0], dp[i][j - 1][k][1]
						dp[i][j][k][0] = dp[i][j - 1][k][0] + X2[j] - X2[j - 1];
						if(i > 0 && dp[i - 1][j - 1][k][0] + X2[j] - X2[j - 1] <= T[N - j]) 
							dp[i][j][k][0] = min(dp[i][j][k][0], dp[i - 1][j - 1][k][0] + X2[j] - X2[j - 1]);
						dp[i][j][k][0] = min(dp[i][j][k][0], dp[i][j - 1][k][1] + X2[j] + X[k]);
						if(i > 0 && dp[i - 1][j - 1][k][1] + X2[j] + X[k] <= T[N - j])
							dp[i][j][k][0] = min(dp[i][j][k][0], dp[i - 1][j - 1][k][1] + X2[j] + X[k]);
					}
					if(k > 0) {
						dp[i][j][k][1] = dp[i][j][k - 1][0] + X2[j] + X[k];
						if(i > 0 && dp[i - 1][j][k - 1][0] + X2[j] + X[k] <= T[k - 1])
							dp[i][j][k][1] = min(dp[i][j][k][1], dp[i - 1][j][k - 1][0] + X2[j] + X[k]);
						dp[i][j][k][1] = min(dp[i][j][k][1], dp[i][j][k - 1][1] + X[k] - X[k - 1]);
						if(i > 0 && dp[i - 1][j][k - 1][1] + X[k] - X[k - 1] <= T[k - 1])
							dp[i][j][k][1] = min(dp[i][j][k][1], dp[i - 1][j][k - 1][1] + X[k] - X[k - 1]);
					}
					if(dp[i][j][k][0] < Long.MAX_VALUE / 2 || dp[i][j][k][1] < Long.MAX_VALUE / 2) ans = i;
				}
			}
		}
		System.out.println(ans);
		in.close();
	}
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 10236 KB Output is correct
2 Correct 86 ms 10360 KB Output is correct
3 Correct 82 ms 10472 KB Output is correct
4 Correct 93 ms 10352 KB Output is correct
5 Correct 84 ms 10176 KB Output is correct
6 Correct 85 ms 10252 KB Output is correct
7 Correct 81 ms 10164 KB Output is correct
8 Correct 80 ms 10220 KB Output is correct
9 Correct 91 ms 10472 KB Output is correct
10 Correct 77 ms 10356 KB Output is correct
11 Correct 84 ms 10344 KB Output is correct
12 Correct 83 ms 10360 KB Output is correct
13 Correct 77 ms 10440 KB Output is correct
14 Correct 79 ms 10356 KB Output is correct
15 Correct 82 ms 10236 KB Output is correct
16 Correct 81 ms 10232 KB Output is correct
17 Correct 81 ms 10488 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 10236 KB Output is correct
2 Correct 86 ms 10360 KB Output is correct
3 Correct 82 ms 10472 KB Output is correct
4 Correct 93 ms 10352 KB Output is correct
5 Correct 84 ms 10176 KB Output is correct
6 Correct 85 ms 10252 KB Output is correct
7 Correct 81 ms 10164 KB Output is correct
8 Correct 80 ms 10220 KB Output is correct
9 Correct 91 ms 10472 KB Output is correct
10 Correct 77 ms 10356 KB Output is correct
11 Correct 84 ms 10344 KB Output is correct
12 Correct 83 ms 10360 KB Output is correct
13 Correct 77 ms 10440 KB Output is correct
14 Correct 79 ms 10356 KB Output is correct
15 Correct 82 ms 10236 KB Output is correct
16 Correct 81 ms 10232 KB Output is correct
17 Correct 81 ms 10488 KB Output is correct
18 Correct 76 ms 10360 KB Output is correct
19 Correct 77 ms 10360 KB Output is correct
20 Correct 80 ms 10344 KB Output is correct
21 Correct 78 ms 10488 KB Output is correct
22 Correct 77 ms 10344 KB Output is correct
23 Correct 79 ms 10344 KB Output is correct
24 Correct 79 ms 10344 KB Output is correct
25 Correct 81 ms 10364 KB Output is correct
26 Correct 82 ms 10336 KB Output is correct
27 Correct 79 ms 10344 KB Output is correct
28 Correct 85 ms 10216 KB Output is correct
29 Correct 80 ms 10456 KB Output is correct
30 Correct 80 ms 10472 KB Output is correct
31 Correct 87 ms 10356 KB Output is correct
32 Correct 82 ms 10232 KB Output is correct
33 Correct 94 ms 10472 KB Output is correct
34 Correct 87 ms 10528 KB Output is correct
35 Correct 82 ms 10472 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 10236 KB Output is correct
2 Correct 86 ms 10360 KB Output is correct
3 Correct 82 ms 10472 KB Output is correct
4 Correct 93 ms 10352 KB Output is correct
5 Correct 84 ms 10176 KB Output is correct
6 Correct 85 ms 10252 KB Output is correct
7 Correct 81 ms 10164 KB Output is correct
8 Correct 80 ms 10220 KB Output is correct
9 Correct 91 ms 10472 KB Output is correct
10 Correct 77 ms 10356 KB Output is correct
11 Correct 84 ms 10344 KB Output is correct
12 Correct 83 ms 10360 KB Output is correct
13 Correct 77 ms 10440 KB Output is correct
14 Correct 79 ms 10356 KB Output is correct
15 Correct 82 ms 10236 KB Output is correct
16 Correct 81 ms 10232 KB Output is correct
17 Correct 81 ms 10488 KB Output is correct
18 Execution timed out 2597 ms 123184 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #4
0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 10236 KB Output is correct
2 Correct 86 ms 10360 KB Output is correct
3 Correct 82 ms 10472 KB Output is correct
4 Correct 93 ms 10352 KB Output is correct
5 Correct 84 ms 10176 KB Output is correct
6 Correct 85 ms 10252 KB Output is correct
7 Correct 81 ms 10164 KB Output is correct
8 Correct 80 ms 10220 KB Output is correct
9 Correct 91 ms 10472 KB Output is correct
10 Correct 77 ms 10356 KB Output is correct
11 Correct 84 ms 10344 KB Output is correct
12 Correct 83 ms 10360 KB Output is correct
13 Correct 77 ms 10440 KB Output is correct
14 Correct 79 ms 10356 KB Output is correct
15 Correct 82 ms 10236 KB Output is correct
16 Correct 81 ms 10232 KB Output is correct
17 Correct 81 ms 10488 KB Output is correct
18 Correct 76 ms 10360 KB Output is correct
19 Correct 77 ms 10360 KB Output is correct
20 Correct 80 ms 10344 KB Output is correct
21 Correct 78 ms 10488 KB Output is correct
22 Correct 77 ms 10344 KB Output is correct
23 Correct 79 ms 10344 KB Output is correct
24 Correct 79 ms 10344 KB Output is correct
25 Correct 81 ms 10364 KB Output is correct
26 Correct 82 ms 10336 KB Output is correct
27 Correct 79 ms 10344 KB Output is correct
28 Correct 85 ms 10216 KB Output is correct
29 Correct 80 ms 10456 KB Output is correct
30 Correct 80 ms 10472 KB Output is correct
31 Correct 87 ms 10356 KB Output is correct
32 Correct 82 ms 10232 KB Output is correct
33 Correct 94 ms 10472 KB Output is correct
34 Correct 87 ms 10528 KB Output is correct
35 Correct 82 ms 10472 KB Output is correct
36 Execution timed out 2597 ms 123184 KB Time limit exceeded
37 Halted 0 ms 0 KB -