답안 #1119524

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1119524 2024-11-27T06:08:35 Z johu Job Scheduling (CEOI12_jobs) Java 11
90 / 100
1000 ms 28884 KB
import java.io.*;
import java.util.*;

public class jobs {
    public static void main(String[] args) throws IOException {
        FastInputReader reader = new FastInputReader(System.in); // Unified input handling

        int n = reader.nextInt(); // Number of days
        int d = reader.nextInt(); // Delay allowed
        int m = reader.nextInt(); // Number of events

        if (m <= 300000) {
            // Use the ArrayList-based implementation for smaller cases
            handleSmallCases(reader, n, d, m);
        } else {
            // Use the provided large case handler
            handleLargeCases(reader, n, d, m);
        }
    }

    private static void handleSmallCases(FastInputReader reader, int n, int d, int m) throws IOException {
        List<Pair> a = new ArrayList<>(m + 2);
        for (int i = 1; i <= m; i++) {
            a.add(new Pair(reader.nextInt(), i));
        }
        a.add(new Pair(1000000000, 0)); // Dummy pair for boundary

        // Sort using built-in sort with natural order
        a.sort(Comparator.naturalOrder());

        int l = 0, r = m;

        while (r - l > 1) {
            int mid = (l + r) / 2;
            int p = 0;

            for (int i = 1; i <= n; i++) {
                if (a.get(p).fr + d < i) {
                    break;
                }
                int cnt = 0;
                while (cnt < mid && p < m && a.get(p).fr <= i) {
                    cnt++;
                    p++;
                }
            }

            if (p >= m) {
                r = mid;
            } else {
                l = mid;
            }
        }

        System.out.println(r);
        StringBuilder sb = new StringBuilder();
        int p = 0;

        for (int i = 1; i <= n; i++) {
            int cnt = 0;
            while (cnt < r && p < m && a.get(p).fr <= i) {
                sb.append(a.get(p).sc).append(" ");
                cnt++;
                p++;
            }
            sb.append("0\n");
        }

        System.out.print(sb);
    }

    private static void handleLargeCases(FastInputReader reader, int n, int d, int m) throws IOException {
        // Using the provided code for large cases
        int[] fr = new int[m + 1];
        int[] sc = new int[m + 1];
        for (int i = 1; i <= m; i++) {
            fr[i] = reader.nextInt();
            sc[i] = i;
        }

        quickSort(fr, sc, 1, m);

        int l = 0, r = m;

        while (r - l > 1) {
            int mid = (l + r) / 2;
            int p = 1;

            for (int i = 1; i <= n; i++) {
                if (p > m || fr[p] + d < i) break;
                int cnt = 0;
                while (cnt < mid && p <= m && fr[p] <= i) {
                    cnt++;
                    p++;
                }
            }

            if (p > m) {
                r = mid;
            } else {
                l = mid;
            }
        }

        // Output results (aligned with small case behavior)
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        bw.write(r + "\n");

        int p = 1;
        for (int i = 1; i <= n; i++) {
            int cnt = 0;
            while (cnt < r && p <= m && fr[p] <= i) {
                bw.write(sc[p] + " ");
                cnt++;
                p++;
            }
            bw.write("0\n");
        }
        bw.flush();
    }

    private static void quickSort(int[] fr, int[] sc, int low, int high) {
        if (low < high) {
            int pivotIndex = partition(fr, sc, low, high);
            quickSort(fr, sc, low, pivotIndex - 1);
            quickSort(fr, sc, pivotIndex + 1, high);
        }
    }

    private static int partition(int[] fr, int[] sc, int low, int high) {
        int pivot = fr[high];
        int i = low - 1;
        for (int j = low; j < high; j++) {
            if (fr[j] <= pivot) {
                i++;
                swap(fr, sc, i, j);
            }
        }
        swap(fr, sc, i + 1, high);
        return i + 1;
    }

    private static void swap(int[] fr, int[] sc, int i, int j) {
        int tempFr = fr[i];
        fr[i] = fr[j];
        fr[j] = tempFr;

        int tempSc = sc[i];
        sc[i] = sc[j];
        sc[j] = tempSc;
    }

    static class Pair implements Comparable<Pair> {
        int fr, sc;

        Pair(int fr, int sc) {
            this.fr = fr;
            this.sc = sc;
        }

        @Override
        public int compareTo(Pair other) {
            return Integer.compare(this.fr, other.fr);
        }
    }

    static class FastInputReader {
        private final DataInputStream din;
        private final byte[] buffer;
        private int bufferPointer, bytesRead;

        public FastInputReader(InputStream in) {
            din = new DataInputStream(in);
            buffer = new byte[1 << 16]; // 64 KB buffer
            bufferPointer = bytesRead = 0;
        }

        private byte read() throws IOException {
            if (bufferPointer == bytesRead) {
                bytesRead = din.read(buffer, 0, buffer.length);
                bufferPointer = 0;
                if (bytesRead == -1) return -1; // End of stream
            }
            return buffer[bufferPointer++];
        }

        public int nextInt() throws IOException {
            int ret = 0;
            byte c = read();
            while (c <= ' ') c = read(); // Skip whitespace
            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;
        }
    }
}
# 결과 실행 시간 메모리 Grader output
1 Correct 241 ms 18844 KB Output is correct
2 Correct 259 ms 18576 KB Output is correct
3 Correct 242 ms 18820 KB Output is correct
4 Correct 249 ms 18924 KB Output is correct
5 Correct 241 ms 18776 KB Output is correct
6 Correct 255 ms 18656 KB Output is correct
7 Correct 244 ms 18652 KB Output is correct
8 Correct 249 ms 18792 KB Output is correct
9 Correct 460 ms 19684 KB Output is correct
10 Correct 394 ms 19740 KB Output is correct
11 Correct 412 ms 18892 KB Output is correct
12 Correct 387 ms 24236 KB Output is correct
13 Correct 498 ms 28884 KB Output is correct
14 Correct 335 ms 19892 KB Output is correct
15 Correct 668 ms 21868 KB Output is correct
16 Correct 343 ms 22640 KB Output is correct
17 Correct 434 ms 26364 KB Output is correct
18 Execution timed out 1047 ms 18336 KB Time limit exceeded
19 Execution timed out 1074 ms 18944 KB Time limit exceeded
20 Correct 468 ms 26368 KB Output is correct