Submission #1067575

#	Time	Username	Problem	Language	Result	Execution time	Memory
1067575		guanex	Stations (IOI20_stations)	C++14	5 / 100	664 ms	832 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>

using namespace std;

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	std::vector<int> labels(n);
    int ed[n];
    vector<vector<int>> x(n);
    for(int i = 0; i < n-1; ++i){
        labels[i] = -1;
        x[u[i]].push_back(v[i]);
        x[v[i]].push_back(u[i]);
    }
    labels[n-1] = -1;
    int root = 0;
    for(int i = 0; i < n; ++i){
        if((int)x[i].size() == 1){
            root = i;
            break;
        }
    }
    queue<int> q;
    q.push(root);
    labels[root] = 0;
    int num = 0;
    while(!q.empty()){
        int p = q.front();
        q.pop();
        for(auto e:x[p]){
            if(labels[e] != -1){
                continue;
            }else{
                q.push(e);
                labels[e] = ++num;
            }
        }
    }
	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
	if(s > t){
        return s-1;
	}else{
        return s+1;
	}
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:8:9: warning: unused variable 'ed' [-Wunused-variable]
    8 |     int ed[n];
      |         ^~

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