Submission #1240269

#	Time	Username	Problem	Language	Result	Execution time	Memory
1240269		Ghulam_Junaid	Stations (IOI20_stations)	C++17	0 / 100	3056 ms	2162688 KiB

stations

#include <bits/stdc++.h>
#include "stations.h"
// #include "stub.cpp"
using namespace std;

const int N = 1e3 + 10;
int sz[N];
vector<int> res, g[N];

void dfs(int v, int p = -1){
    sz[v] = 1;
    for (int u : g[v]){
        if (u == p) continue;
        dfs(u, v);
        sz[v] += sz[u];
    }
}

void assign(int v, int l = 0, int r = sz[0], int p = -1){
    if (p == -1 or res[p] == l)
        res[v] = l + sz[v];
    else
        res[v] = l + 1;

    int prv = 0;
    for (int u : g[v]){
        if (u == p) continue;
        if (res[v] == l + 1) assign(u, l + 1 + prv, r, v);
        else assign(u, l + prv, r - 1, v);
        prv += sz[u];
    }
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	res.resize(n);
    for (int i = 0; i < n - 1; i ++){
        g[u[i]].push_back(v[i]);
        g[v[i]].push_back(u[i]);
    }
    dfs(0);
    assign(0);
	return res;
}

int find_next_station(int s, int t, vector<int> c) {
    if (c.size() == 1) return c[0];
    if (s < c[0]){
        if (t < s) return c.back();
    }
    else{
        if (t > s) return c[0];
    }
    int ind = upper_bound(c.begin(), c.end(), t) - c.begin() - 1;
    return c[ind];
}

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