Submission #151339

#	Time	Username	Problem	Language	Result	Execution time	Memory
151339		dongwon0427	Crosses on the Grid (FXCUP4_cross)	C++17	100 / 100	113 ms	10728 KiB

cross

#include "cross.h"
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> pii;
typedef long long ll;
long long SelectCross(int k, std::vector<int> I, std::vector<int> O) {
	int n = I.size();
	vector<pii> v;
	for(int i=0;i<n;i++) {
        v.push_back(pii(O[i], I[i]));
	}
	sort(v.begin(), v.end());

	priority_queue<int> pq;
    for(int i=n-k;i<n;i++) {
        pq.push(-v[i].second);
    }
    ll ret = (ll)v[n-k].first * v[n-k].first - (ll)(v[n-k].first + pq.top()) * (v[n-k].first + pq.top());
	for(int i=n-k-1;i>=0;i--) {
        if(-v[i].second <= pq.top()) {
            pq.pop();
            pq.push(-v[i].second);
        }
        ret = max(ret, (ll)v[i].first * v[i].first - (ll)(v[i].first + pq.top()) * (v[i].first + pq.top()));
	}
	return ret;
}

• Subtask 1: 8 / 8
• Subtask 2: 55 / 55
• Subtask 3: 37 / 37