Submission #933656

#	Time	Username	Problem	Language	Result	Execution time	Memory
933656		carriewang	Advertisement 2 (JOI23_ho_t2)	C++17	100 / 100	125 ms	19404 KiB

Main

#include <bits/stdc++.h>
#define ll long long
#define vi vector<int>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define sz(x) x.size()
#define all(x) x.begin(),x.end()
#define F first
#define S second
using namespace std;
const int maxn=500005;
int n;
pii p[maxn];
vector<pii> ans;
bool compare(pii a,pii b){
    if(abs(b.first-a.first)<=b.second-a.second) return 1;
    return 0;
}
int main(){
    ios::sync_with_stdio(0),cin.tie(0);
    cin >> n;
    for(int i=0;i<n;i++){
        cin >> p[i].F >> p[i].S;
    }
    sort(p,p+n);
    for(int i=0;i<n;i++){
        if(ans.empty()) ans.emplace_back(p[i]);
        else{
            if(!compare(p[i],ans.back())){
                while(!ans.empty() && compare(ans.back(),p[i])) ans.pop_back();
                ans.emplace_back(p[i]);
            }
        }
    }
    cout << ans.size() << "\n";
}

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