Submission #550320

#	Time	Username	Problem	Language	Result	Execution time	Memory
550320		Zhora_004	A Difficult(y) Choice (BOI21_books)	C++17	0 / 100	3 ms	976 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.
//

void solve(int n, int k, long long a, int s) {
    /*if (x[1] == 42) {
        impossible();
    } else {
        answer({1, 3});
    }*/
    vector<long long> x(n);
    for (int i = 0; i < n; i++) x[i] = skim(i + 1);
    for (int i = 0; i < n - 2; i++)
    {
        for (int j = i + 1; j < n - 1; j++)
        {
            long long sum = x[i] + x[j];
            if (sum > 2 * a) break;
            // sum + num <= 2 * a
            // num <= 2 * a - sum
            auto it = lower_bound(x.begin() + j + 1, x.end(), a * 2 - sum);
            if (it == x.end()) continue;
            int id = it - x.begin();
            sum += x[id];
            if (a <= sum && sum <= 2 * a) answer({ i + 1, j + 1, id + 1 });
        }
    }
    impossible();
}

• 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