Submission #150069

#	Time	Username	Problem	Language	Result	Execution time	Memory
150069		GucciBelt (#200)	Crosses on the Grid (FXCUP4_cross)	C++17	8 / 100	116 ms	5736 KiB

cross

#include <bits/stdc++.h>
#include "cross.h"
#define long long long 
#define pii pair<int, int>
#define x first
#define y second
using namespace std;

const int INF = 1e9+1;

int n;
long ans;

long SelectCross(int K, vector<int> I, vector<int> O) {
	n = I.size();
	vector<pii> vec;
	for(int i = 0; i < n; ++i) vec.emplace_back(O[i], I[i]);
	sort(vec.begin(), vec.end(), [&](const pii &a, const pii &b) {
		if(a.x != b.x) return a.x > b.x;
		return a.y < b.y;
	});
	priority_queue<int> Q;
	for(auto x : vec) {
		// cerr << x.x << ' ' << x.y << endl;

		if(Q.size() == K) Q.pop();
		if(Q.size() == K-1) {
			int v = min(x.y, Q.empty() ? INF : Q.top());
			ans = max(ans, 1ll * x.x * x.x - 1ll * (x.x - v) * (x.x - v));
		}
		Q.emplace(x.y);
	}
	return ans;
}

Compilation message (stderr)

cross.cpp: In function 'long long int SelectCross(int, std::vector<int>, std::vector<int>)':
cross.cpp:26:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(Q.size() == K) Q.pop();
      ~~~~~~~~~^~~~
cross.cpp:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(Q.size() == K-1) {
      ~~~~~~~~~^~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 55
• Subtask 3: 0 / 37