Submission #1011245

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011245		overwatch9	A Difficult(y) Choice (BOI21_books)	C++17	0 / 100	1 ms	1112 KiB

books

#include <bits/stdc++.h>

#include "books.h"

using namespace std;
using ll = long long;
//
// --- 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.
//


// vector <int> NUMS;
// ll skim(int x) {
//     return NUMS[x];
// }

void solve(int N, int K, ll A, int S) {
    vector <int> ans;
    ll sum = 0;
    vector <ll> nums(N+1);
    for (int i = 1; i <= K; i++) {
        nums[i] = skim(i);
        sum += nums[i];
        S--;
    }
    int lst = N;
    for (int i = K; i >= 1 && sum < A; i--) {
        int lo = K+1, hi = lst;
        while (lo <= hi) {
            int mid = (lo + hi) / 2;
            ll val = nums[mid];
            if (nums[mid] == 0) {
                if (S <= 0)
                    break;
                S--;
                nums[mid] = skim(mid);
                val = mid;
            }
            ll sum2 = sum - nums[i] + val;
            if (sum2 >= A && sum2 <= 2 * A) {
                ans.push_back(mid);
                sum = sum2;
                break;
            } else if (sum2 < A)
                lo = mid+1;
            else
                hi = mid-1;
        }
        if (sum >= A) {
            for (int j = 1; j < i; j++)
                ans.push_back(j);
            answer(ans);
        } else {
            sum -= nums[i];
            sum += nums[hi];
            if (nums[hi] == 0) {
                nums[hi] = skim(hi);
                sum += nums[hi];
            }
            ans.push_back(hi);
            lst = hi - 1;
        }
    }
    impossible();
}
// int main() {
//     int n, k, a, s;
//     cin >> n >> k >> a >> s;
//     NUMS.resize(n+1);
//     for (int i = 1; i <= n; i++)
//         cin >> NUMS[i];
//     solve(n, k, a, s);
// }

• 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