Submission #936984

#	Time	Username	Problem	Language	Result	Execution time	Memory
936984		tianyaochiun	Advertisement 2 (JOI23_ho_t2)	C++17	100 / 100	131 ms	27340 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
#define ll long long
#define pii pair<long long,long long> 
#define F first
#define S second
#define pb emplace_back
#define endl "\n"
#define all(a) a.begin(),a.end()
#define int long long

void solve(){
	int n;
	cin>>n;
	vector<pii> a(n);
	for(int i=0;i<n;i++){
		cin>>a[i].F>>a[i].S;
	}
	sort(all(a));
	vector<pii> stk;
	for(int i=0;i<n;i++){
		if(stk.size()&&stk.back().F+stk.back().S-a[i].S>=a[i].F) continue;
		while(stk.size()&&a[i].F-a[i].S+stk.back().S<=stk.back().F) stk.pop_back();
		stk.pb(a[i]);
	}
	cout<<(int)stk.size();
}

signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t=1;
	//cin>>t;
	while(t--){
		solve();
	}
	return 0;
}

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