Submission #798943

#	Time	Username	Problem	Language	Result	Execution time	Memory
798943		vjudge1	Advertisement 2 (JOI23_ho_t2)	C++14	100 / 100	159 ms	12280 KiB

Main

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define fi first
#define se second
#define ll long long
using namespace std ;
using namespace __gnu_pbds;
const int N = 5e5 ;
int n, ans ;
pair<int, int> p[N + 1] ;
signed main()
{
    ios_base::sync_with_stdio( 0 ) ;
    cin.tie( 0 ) ;
    cout.tie( 0 ) ;
    cin >> n ;
    for(int i = 1 ; i <= n ; i++)
        cin >> p[i].fi >> p[i].se ;
    sort(p + 1, p + n + 1) ;
    vector<pair<int, int>> abu ;
    for(int i = 1 ; i <= n ; i++)
    {
        if(abu.size() && p[i].fi - abu.back().fi <= abu.back().se - p[i].se)
            continue ;
        while(abu.size() && p[i].fi - abu.back().fi <= p[i].se - abu.back().se)
            abu.pop_back() ;
        abu.push_back(p[i]) ;
    }
    cout << abu.size() ;
    return 0 ;
}

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