제출 #546448

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
546448		d4xn	A Difficult(y) Choice (BOI21_books)	C++17	0 / 100	1 ms	208 KiB

books

#include <bits/stdc++.h>

#include "books.h"

using namespace std;
//
// --- Sample implementation for the task books ---
//
// To compile this program with the sample grader, place:
//     books.h books_sample.cpp sample_grader.cpp
// in a single folder and run:
//     g++ books_sample.cpp sample_grader.cpp
// in this folder.
//

#define ll long long

void solve(int N, int K, long long A, int S) {
    // TODO implement this function
    // impossible()
    // answer()
    // puedo hacer S preguntas
    // hay N libros
    // ordenados de mayor a menor por precio
    // tengo que comprar K
    // y la suma tiene que ser >= A y <= A*2

    int l = K;
    int r = N;
    while (l < r) {
        int mid = (l+r)/2;
        ll x = skim(mid);

        ll low = x + (mid-1)*1;
        ll high = x*mid;
        if (low < A && high > A*2) impossible();
        else if (low < A && high <= A*2) {
            l = mid+1;
        }
        else {
            r = mid-1;
        }
    }

    vector<int> ans;
    for (int i = l - K + 1; i <= l; i++) ans.push_back(i);
    answer(ans);

/*
    if (skim(2) == 42) {
        impossible();
    } else {
        answer({1, 3});
    }
    */
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20