Submission #983302

#	Time	Username	Problem	Language	Result	Execution time	Memory
983302		Malix	Advertisement 2 (JOI23_ho_t2)	C++14	100 / 100	408 ms	19928 KiB

Main

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;

#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define MP make_pair

ll INF=1e18+10;
ll M=1e9+7;

int main() {   
//ios::sync_with_stdio(0);
//cin.tie(0);
//freopen("test_input.txt", "r", stdin);
//freopen("test_output.txt", "w", stdout);
    int n;cin>>n;
    pii a(n);
    REP(i,0,n)cin>>a[i].F>>a[i].S;
    sort(a.begin(),a.end());
    priority_queue<pi> pq;
    REP(i,0,n)pq.push({a[i].S,i});
    vi b(n,0);
    int ans=0;
    while(!pq.empty()){
        int pos=pq.top().S;
        pq.pop();
        if(b[pos]==1)continue;
        //cout<<pos<<" ";
        b[pos]=1;
        ans++;
        int g=1;
        while((pos-g>=0)&&(b[pos-g]==0)&&(a[pos].S-a[pos-g].S>=a[pos].F-a[pos-g].F)){
            //cout<<pos-g<<" ";
            b[pos-g]=1;
            g++;
        }
        g=1;
        while((pos+g<n)&&(b[pos+g]==0)&&(a[pos].S-a[pos+g].S>=a[pos+g].F-a[pos].F)){
            b[pos+g]=1;
            g++;
        }
    }
    cout<<ans;
}

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