Submission #519702

#	Time	Username	Problem	Language	Result	Execution time	Memory
519702		ac2hu	Arcade (NOI20_arcade)	C++14	30 / 100	644 ms	328 KiB

Arcade

#include <bits/stdc++.h>
using namespace std;
const int N = 5e5 + 10;
struct mov{
    int t,loc;
} a[N];
int n,m;
signed main(){
    iostream::sync_with_stdio(false);
    cin.tie(nullptr);cout.tie(nullptr);
    mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
    cin >> n >> m;
    vector<pair<int,int>> a(m);
    for(int i = 0;i<m;i++){
        cin >> a[i].first;
    }
    for(int i =0 ;i<m;i++){
        cin >> a[i].second;
    }
    sort(a.begin(),a.end(),[&](pair<int,int> a,pair<int,int> b){
        return a.first < b.first||(a.first == b.first && a.second > b.second);
    });
    a.erase(unique(a.begin(),a.end()), a.end());
    m = a.size();
    // int idxx[m];
    // for(int i = 0;i<m;i++)
    //     cout << a[i].first << " ";
    // cout << "\n";
    // for(int i = 0;i<m;i++)
    //     cout << a[i].second << " ";
    // cout << "\n";
    int ans = 1e9;
    for(int i = 0;i<10000;i++){
        vector<int> arms;
        for(int i = 0;i<m;i++){
            int idx = -1;
            vector<int> vec;
            for(int j = 0;j<(int)arms.size();j++){
                int e = arms[j];
                if(abs(a[e].second - a[i].second) <= abs(a[e].first - a[i].first)){
                    vec.push_back(j);
                }
            }
            if(vec.size() == 0){
                arms.push_back(i);
            }
            else{
                idx = vec[(rng()%(int)vec.size())];
                arms[idx] = i;
            }
        }   
        ans = min(ans,(int)arms.size());
    }
    cout << ans << "\n";
}

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 0 / 21
• Subtask 5: 0 / 14
• Subtask 6: 0 / 20
• Subtask 7: 0 / 15