Submission #810651

#	Time	Username	Problem	Language	Result	Execution time	Memory
810651		MyCode	A Difficult(y) Choice (BOI21_books)	C++17	5 / 100	170 ms	1068 KiB

books

#include <bits/stdc++.h>

#include "books.h"

using namespace std;

void solve(int n, int k, long long A, int s) {
    long long a[n + 1];
    for (int i = 1; i <= n; i++)
        a[i] = skim(i);
    for (int i = 1; i < n - 1; i++) {
        for (int j = i + 1; j < n; j++) {
            long long sum = a[i] + a[j];
            if (sum > 2 * A)
                continue;
            int l = j + 1, r = n;
            while (r - l > 1) {
                int m = (l + r) >> 1;
                if (a[m] >= A - sum)
                    r = m;
                else
                    l = m;
            }
            int ind = -1;
            if (a[l] >= A - sum) ind = l;
            else if (a[r] >= A - sum) ind = r;
            if (ind != -1 && sum + a[ind] <= 2 * A) {
                answer({i, j, ind});
                return;
            }
        }
    }
    impossible();
}

• Subtask 1: 5 / 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