Submission #951995

#	Time	Username	Problem	Language	Result	Execution time	Memory
951995		GrandTiger1729	Cake 3 (JOI19_cake3)	C++17	24 / 100	4043 ms	5908 KiB

cake3

#include <bits/stdc++.h>
using namespace std;
 
const long long INF = 1e18;
int main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n, K;
    cin >> n >> K;
    vector<pair<int, int>> a(n);
    for (int i = 0; i < n; i++)
    {
        cin >> a[i].second >> a[i].first;
    }
    sort(a.begin(), a.end());
    long long ans = -INF;
    for (int i = 0; i < n; i++)
    {
        long long cur = 0;
        priority_queue<int, vector<int>, greater<>> pq;
        for (int j = i; j >= 0; j--)
        {
            pq.push(a[j].second);
            cur += a[j].second;
            while (pq.size() > K)
            {
                cur -= pq.top();
                pq.pop();
            }
            if (pq.size() == K)
            {
                ans = max(ans, cur - 2ll * (a[i].first - a[j].first));
            }
        }
    }
    cout << ans << '\n';
    return 0;
}

Compilation message (stderr)

cake3.cpp: In function 'int main()':
cake3.cpp:25:30: warning: comparison of integer expressions of different signedness: 'std::priority_queue<int, std::vector<int>, std::greater<void> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |             while (pq.size() > K)
      |                    ~~~~~~~~~~^~~
cake3.cpp:30:27: warning: comparison of integer expressions of different signedness: 'std::priority_queue<int, std::vector<int>, std::greater<void> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   30 |             if (pq.size() == K)
      |                 ~~~~~~~~~~^~~~

• Subtask 1: 5 / 5
• Subtask 2: 19 / 19
• Subtask 3: 0 / 76