Submission #1119467

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119467		johu	Job Scheduling (CEOI12_jobs)	Java	0 / 100	70 ms	12028 KiB

jobs

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

public class jobs {
    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);
        }
    }

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());

        int n = Integer.parseInt(st.nextToken()); // Number of days
        int d = Integer.parseInt(st.nextToken()); // Delay allowed
        int m = Integer.parseInt(st.nextToken()); // Number of events

        Pair[] a = new Pair[m + 2];
        for (int i = 1; i <= m; i++) {
            int fr = Integer.parseInt(st.nextToken());
            a[i] = new Pair(fr, i); // Store event and its index
        }
        a[m + 1] = new Pair((int) 1e9, 0); // Add a dummy pair for boundary handling

        Arrays.sort(a, 1, m + 1); // Sort by the `fr` value

        int l = 0, r = m;

        // Binary search to find the minimum value of `r`
        while (r - l > 1) {
            int mid = (l + r) / 2;
            int p = 1;
            boolean valid = true;

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

            if (valid && p > m) {
                r = mid; // Valid with this `mid`
            } else {
                l = mid; // Not valid, increase `l`
            }
        }

        // Print the result
        System.out.println(r);
        int p = 1;
        StringBuilder sb = new StringBuilder();

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

        System.out.print(sb);
    }
}

• Subtask 1: 0 / 100