Submission #1217083

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217083		cpdreamer	Stations (IOI20_stations)	C++20	10 / 100	314 ms	548 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
const long long INF = 1e17;
typedef long long ll;
const ll MOD = (ll)1e9+7;
#define P pair
#define S second
#define F first
#define pb push_back
#define V vector
#define all(v) v.begin(), v.end()
V<int>adj[(int)1000];
V<P<int,int>>vp(1000);
int cnt=0;
void dfs(int n,int p) {
    vp[n].F=cnt;
    for (auto u:adj[n]) {
        if(u==p)continue;
        cnt++;
        dfs(u,n);
    }
    vp[n].S=cnt;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    for (int i=0;i<n-1;i++) {
        adj[u[i]].pb(v[i]);
        adj[v[i]].pb(u[i]);
    }
    dfs(0,-1);
    V<int>l(n);
    for (int i=0;i<n;i++) {
        l[i]=1000*vp[i].F+vp[i].S;
    }
    for (int i=0;i<n;i++) {
        adj[i].clear();
    }
    return l;
}
bool check(int x,int y) {
    int r=x%1000;
    int l=(x-r)/1000;
    int n=(y-y%1000)/1000;
    return (n>=l && n<=r);
}
int find_next_station(int s, int t, std::vector<int> c) {
    for (int i=1;i<(int)c.size();i++) {
        if (check(c[i],t)) {
            return c[i];
        }
    }
    return c[0];
}

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