Submission #74220298

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Source Code Expand

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

public class Main {
    public static void main(String[] args) {
        InputReader reader = new InputReader(System.in);
        PrintWriter writer = new PrintWriter(System.out, false);
        int N = reader.nextInt();
        int M = reader.nextInt();
        int[][] A = new int[N][2];
        for (int i = 0; i < N; i++) {
            for (int j = 0; j < 2; j++) {
                A[i][j] = reader.nextInt();
            }
        }
        int[] B = new int[M];
        for (int i = 0; i < M; i++) {
            B[i] = reader.nextInt();
        }
        long result = maximumSales(A, B);
        writer.println(result);
        writer.close();
        System.exit(0);
    }

    private static long maximumSales(int[][] A, int[] B) {
        Arrays.sort(A, Comparator.comparing(x -> x[0]));
        Arrays.sort(B);
        long result = 0;
        int j = 0;
        PriorityQueue<Integer> heap = new PriorityQueue<>(Collections.reverseOrder());
        for (int K : B) {
            while (j < A.length && A[j][0] <= K) heap.offer(A[j++][1]);
            if (heap.isEmpty()) return -1;
            result += heap.poll();
        }
        return result;
    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;
        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }
        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }
        public int nextInt() {
            return Integer.parseInt(next());
        }
        public long nextLong() {
            return Long.parseLong(next());
        }
        public double nextDouble() {
            return Double.parseDouble(next());
        }
        public String nextLine() {
            String str = "";
            try {
                str = reader.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }
}

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