Submission #1158026

#	Time	Username	Problem	Language	Result	Execution time	Memory
1158026		SmuggingSpun	Advertisement 2 (JOI23_ho_t2)	C++20	69 / 100	228 ms	25672 KiB

Main

#include<bits/stdc++.h>
#define taskname "B"
using namespace std;
template<class T>void maximize(T& a, T b){
	if(a < b){
		a = b;
	}
}
const int lim = 5e5 + 5;
int n, X[lim], E[lim];
namespace sub1{
	void solve(){
		map<int, bool>cnt;
		for(int i = 1; i <= n; i++){
			cnt[X[i]] = true;
		}
		cout << cnt.size();
	}
}
namespace sub23{
	void solve(){
		map<int, int>repu;
		for(int i = 1; i <= n; i++){
			maximize(repu[X[i]], E[i]);
		}
		n = repu.size();
		vector<pair<int, int>>vertex;
		for(pair<const int, int>& it : repu){
			vertex.emplace_back(it);
		}
		vector<bool>d(n, true);
		for(int i = 0; i < n; i++){
			for(int j = 0; j < n; j++){
				if(i != j && abs(vertex[i].first - vertex[j].first) <= vertex[i].second - vertex[j].second){
					d[j] = false;
				}
			}
		}
		cout << count(d.begin(), d.end(), true);
	}
}
namespace sub4{
	void solve(){
		
	}
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
	cin >> n;
	for(int i = 1; i <= n; i++){
		cin >> X[i] >> E[i];
	}
	if(*min_element(E + 1, E + n + 1) == *max_element(E + 1, E + n + 1)){
		sub1::solve();
	}
	else if(n <= 1000){
		sub23::solve();
	}
	else{
		sub4::solve();
	}
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:50:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 0 / 31