Submission #1140310

#	Time	Username	Problem	Language	Result	Execution time	Memory
1140310		Almonther	Stations (IOI20_stations)	C++20	5 / 100	310 ms	564 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>

#define ll long long
#define co cout<<
using namespace std;
//stuff
const ll maxn=1005;
ll a[maxn]={};
vector<ll>v1[maxn];
ll tim=0;
void dfs(ll x,ll last,ll dep){
    if(dep%2==0) a[x]=tim++;
    for(auto i:v1[x]){
        if(i!=last) dfs(i,x,dep+1);
    }
    if(dep%2) a[x]=tim++;
}
vector<int>label(int n, int k, vector<int> u, vector<int> v){
    for(int i=0;i<u.size();i++){
        v1[u[i]].push_back(v[i]);
        v1[v[i]].push_back(u[i]);
    }
    dfs(0,0,0);
    ll cnt=0;
    vector<int>labels;
    for(int i=0;i<n;i++) labels.push_back(a[i]);
    for(int i=0;i<=n;i++) v1[i].clear();
    memset(a,0,sizeof(a));
    tim=0;
    return labels;
}
int find_next_station(int s, int t, vector<int> c) {
    set<ll>s1;
    for(auto i:c) s1.insert(i);
    ll parent;
    ll l,r;
    if(s==0){
        vector<int>v;
        for(auto i:s1) v.push_back(i);
        sort(v.begin(),v.end());
        for(int i=0;i<v.size()-1;i++){
            if(v[i]>=t) return v[i];
        }
        return v.back();
    }
    else if(s<=*s1.begin()){
        auto it=s1.end();
        it--;
        parent=*it;
        s1.erase(it);
        if(s1.size()==0) return parent;
        it=s1.end();
        it--;
        l=s;
        r=*it;
        // co "wow\n"; 
        if(!(l<=t&&t<=r)) return parent;
        vector<int>v;
        for(auto i:s1) v.push_back(i);
        // odd they have the finishing i have the starting
        // co "at least here\n";
        sort(v.begin(),v.end());
        for(int i=0;i<v.size()-1;i++){
            if(v[i]<=t&&t<v[i+1]) return v[i];
        }
        return v.back();
    }
    else{
        parent=*s1.begin();
        s1.erase(s1.begin());
        if(s1.size()==0) return parent;
        l=*s1.begin();
        r=s;
        if(!(l<=t&&t<=r)) return parent;
        // even i'm the ending time
        // they have the starting
        vector<int>v;
        for(auto i:s1) v.push_back(i);
        sort(v.begin(),v.end());
        for(int i=0;i<v.size()-1;i++){
            if(v[i]<=t&&t<v[i+1]) return v[i];
        }
        return v.back();
    }
    return c[0];
}

// int main(){
//     co find_next_station(1,3,{5,2,3});
//     // co find_next_station(4,3,{2,1});
//     // vector<int>smth=label(5,1000,{0,1,2,3},{1,2,3,4});
//     // for(int i=0;i<smth.size();i++){
//     //     co i<<' '<<smth[i]<<'\n';
//     // }
// }

• Subtask 1: 5 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61