Submission #517045

#	Time	Username	Problem	Language	Result	Execution time	Memory
517045		Ai7081	Stations (IOI20_stations)	C++17	0 / 100	3022 ms	2097156 KiB

stations

#include <bits/stdc++.h>
using namespace std;
const int N = 1005;

int cnt;
vector<int> adj[N], ret;

void dfs1(int v, int p) {
    ret[v] = cnt++;
    for (auto to : adj[v]) {
        if (to != p) {
            dfs1(to, v);
        }
    }
    return;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    int idx, p;
    for (int i=0; i<n-1; 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) { idx = i; break; }
    }
    ret.assign(n, 0);
    cnt = 0;
    dfs1(idx, idx);
    return ret;
}

int find_next_station(int s, int t, vector<int> c) {
    return (s < t) ? s+1 : s-1;
}
/*
int main() {
    int n = 5;
    int k = 20;
    vector<int> u = {0, 1, 2, 3};
    vector<int> v = {1, 2, 3, 4};
    vector<int> out = label(n, k, u, v);
    for (auto it : out) cout << it << ' ';
    cout << find_next_station(2, 4, v);
}
*/

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:19:14: warning: unused variable 'p' [-Wunused-variable]
   19 |     int idx, p;
      |              ^
stations.cpp:29:9: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   29 |     dfs1(idx, idx);
      |     ~~~~^~~~~~~~~~

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