Submission #805151

#	Time	Username	Problem	Language	Result	Execution time	Memory
805151		Andrey	Stations (IOI20_stations)	C++14	5 / 100	775 ms	1124 KiB

stations

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

vector<int> yay(0);
vector<int> haha[10001];
int p;

void dfs(int a, int t) {
    yay[a] = p;
    p++;
    for(int i = 0; i < haha[a].size(); i++) {
        if(haha[a][i] != t) {
            dfs(haha[a][i],a);
        }
    }
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    for(int i = 0; i < n; i++) {
        haha[i].clear();
    }
    for(int i = 0; i < n-1; i++) {
        haha[u[i]].push_back(v[i]);
        haha[v[i]].push_back(u[i]);
    }
    p = 0;
    yay.clear();
	for(int i = 0; i < n; i++) {
        yay.push_back(0);
	}
	vector<int> ans(0);
	for(int i = 0; i < n; i++) {
        if(haha[i].size() == 1) {
            dfs(i,-1);
            break;
        }
	}
	for(int i = 0; i < n; i++) {
        ans.push_back(yay[i]);
	}
    return ans;
}

int find_next_station(int s, int t, vector<int> c) {
    if(s == 0) {
        for(int i = 0; i < c.size(); i++) {
            if(c[i] <= t && (i == c.size()-1 || c[i+1] > t)) {
                return c[i];
            }
        }
    }
    else {
        if(t < s) {
            return c[0];
        }
        else {
            for(int i = 1; i < c.size(); i++) {
                if(c[i] <= t && (i == c.size()-1 || c[i+1] > t)) {
                    return c[i];
                }
            }
        }
    }
}

Compilation message (stderr)

stations.cpp: In function 'void dfs(int, int)':
stations.cpp:12:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(int i = 0; i < haha[a].size(); i++) {
      |                    ~~^~~~~~~~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:47:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |         for(int i = 0; i < c.size(); i++) {
      |                        ~~^~~~~~~~~~
stations.cpp:48:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |             if(c[i] <= t && (i == c.size()-1 || c[i+1] > t)) {
      |                              ~~^~~~~~~~~~~~~
stations.cpp:58:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |             for(int i = 1; i < c.size(); i++) {
      |                            ~~^~~~~~~~~~
stations.cpp:59:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |                 if(c[i] <= t && (i == c.size()-1 || c[i+1] > t)) {
      |                                  ~~^~~~~~~~~~~~~
stations.cpp:65:1: warning: control reaches end of non-void function [-Wreturn-type]
   65 | }
      | ^

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