Submission #336025

#	Time	Username	Problem	Language	Result	Execution time	Memory
336025		richyrich	Stations (IOI20_stations)	C++17	5 / 100	978 ms	1900 KiB

stations

#include "stations.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;
const int N = 1e4+3;
const int inf = 1e9;
int ans[N], timer, vis[N];
vector<vector<int>> adj(N);
void dfs(int x, int par) {
    vis[x] = 1;
    for(int y : adj[x]) {
        if(y==par || vis[y]) continue;
        dfs(y, x);
    }
    ans[x] = timer;
    timer++;
    return;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    timer = 0;
    for(int i = 0; i < n; i++) {
        adj[i].clear();
        vis[i] = 0;
        ans[i] = 0;
    }
    for(int i = 0; i < u.size(); i++) {
        adj[u[i]].push_back(v[i]), adj[v[i]].push_back(u[i]);
    }
    for(int i = 0; i < n; i++) {
        if(adj[i].size()==1) {
            dfs(i, -1);
            break;
        }
    }
    std::vector<int> labels(n);
    for(int i = 0; i < n; i++) labels[i] = ans[i];
    return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
    int n = c.size();
    if(s > t) return c[0];
    else return c[n-1];
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:26:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(int i = 0; i < u.size(); i++) {
      |                    ~~^~~~~~~~~~

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