Submission #149467

#	Time	Username	Problem	Language	Result	Execution time	Memory
149467		Solo Leveling (#200)	Crosses on the Grid (FXCUP4_cross)	C++17	0 / 100	6 ms	384 KiB

cross

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

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <bits/stdc++.h>
using namespace __gnu_pbds;
using namespace std;
typedef long long ll;
// order_of_key
typedef tree<
pair<int, int>,
null_type,
less<pair<ll, int>>,
rb_tree_tag,
tree_order_statistics_node_update> ordered_set;
ordered_set X;

long long SelectCross(int K, std::vector<int> I, std::vector<int> O) {
	vector<pii> v(I.size());
	for(int i = 0 ; i < I.size() ; i ++){
		v.push_back(pii(O[i] , I[i]));
	}
	sort(v.rbegin() , v.rend());
	ll ans = 0;
	for(int i = 0 ; i < I.size() ; i ++){
		X.insert(pii(-v[i].second, i));
		if(X.size() >= K){
			pii R = *X.find_by_order(K-1);
			R.first *= -1;
			R.first = min(R.first , v[i].second);
			// cout<<v[i].first * v[i].first<<" " << -2*(v[i].first - R.first) << endl;
			ans = max(ans ,v[i].first * v[i].first - 2LL*(v[i].first - R.first));
		}
		// cout<<v[i].first<<" "<<v[i].second<<endl;
	}
	return ans;
}

Compilation message (stderr)

cross.cpp: In function 'long long int SelectCross(int, std::vector<int>, std::vector<int>)':
cross.cpp:25:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0 ; i < I.size() ; i ++){
                  ~~^~~~~~~~~~
cross.cpp:30:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0 ; i < I.size() ; i ++){
                  ~~^~~~~~~~~~
cross.cpp:32:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(X.size() >= K){
      ~~~~~~~~~^~~~

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