Submission #982539

#	Time	Username	Problem	Language	Result	Execution time	Memory
982539		Jarif_Rahman	Cake 3 (JOI19_cake3)	C++17	24 / 100	4102 ms	8244 KiB

cake3

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, m; cin >> n >> m;
    vector<pair<ll, ll>> cv(n);
    for(auto &[c, v]: cv) cin >> v >> c;
    sort(cv.begin(), cv.end());

    ll ans = -1e18;
    for(int i = 0; i < n; i++){
        ll sum = 0;
        priority_queue<ll> pq;
        for(int j = i; j < n; j++){
            if(pq.size() < m) sum+=cv[j].second, pq.push(-cv[j].second);
            else if(cv[j].second > -pq.top()){
                sum+=pq.top();
                pq.pop();
                sum+=cv[j].second;
                pq.push(-cv[j].second);
            }
            if(j-i+1 >= m) ans = max(ans, sum-(cv[j].first-cv[i].first)*2);
        }
    }

    cout << ans << "\n";
}

Compilation message (stderr)

cake3.cpp: In function 'int main()':
cake3.cpp:22:26: warning: comparison of integer expressions of different signedness: 'std::priority_queue<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   22 |             if(pq.size() < m) sum+=cv[j].second, pq.push(-cv[j].second);
      |                ~~~~~~~~~~^~~

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