Submission #306687

#	Time	Username	Problem	Language	Result	Execution time	Memory
306687		baluteshih	Stations (IOI20_stations)	C++14	52.32 / 100	979 ms	1232 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define X first
#define Y second
#define ALL(v) v.begin(),v.end()
#define pb push_back
#define SZ(a) ((int)a.size())

const int C=1000;
vector<int> G[1005],idx;
int dft;

void dfs(int u,int f)
{
    idx[u]=(++dft)*C;
    for(int i:G[u])
        if(i!=f)
            dfs(i,u);
    idx[u]+=dft;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v)
{
    idx.resize(n),dft=-1;
    for(int i=0;i<n;++i)
        G[i].clear();
    for(int i=0;i+1<n;++i)
        G[u[i]].pb(v[i]),G[v[i]].pb(u[i]);
    dfs(0,0);
    return idx;
}

int find_next_station(int s, int t, vector<int> c)
{
	if(s/C<=t/C&&s%C>=t%C)
        for(int i:c)
        {
            if(i>s&&i/C<=t/C&&i%C>=t%C)
                return i;
        }
    return *min_element(ALL(c));
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 26.3205 / 61