Submission #304965

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
304965	2020-09-22 09:48:55	galca	Stations (IOI20_stations)	C++14	100 / 100	1253 ms	1056 KiB

stations

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#include "stations.h"
#include <vector>
using namespace std;
int label_nodes(vector<vector<int>>& nodes, vector<int>& labels, bool isMin, int id, int me, int father) {
  if ((father != -1) && (nodes[me].size() == 1)) {
    // a leaf
    labels[me] = id;
    return id+1;
  }
  if (isMin) {
    labels[me] = id;
    int next_id = id + 1;
    for (int i = 0; i < nodes[me].size(); i++) {    
      if (nodes[me][i] != father) {
        next_id = label_nodes(nodes, labels, !isMin, next_id, nodes[me][i], me);
      }
    }
    return next_id;
  }
  else {
    int next_id = id;
    for (int i = 0; i < nodes[me].size(); i++) {
      if (nodes[me][i] != father) {
        next_id = label_nodes(nodes, labels, !isMin, next_id, nodes[me][i], me);
      }
    }
    labels[me] = next_id;
    return next_id + 1;
 
 
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Compilation message (stderr)

stations.cpp: In function 'int label_nodes(std::vector<std::vector<int> >&, std::vector<int>&, bool, int, int, int)':
stations.cpp:15:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |   for (int i = 0; i < nodes[me].size(); i++) {
      |                   ~~^~~~~~~~~~~~~~~~~~
stations.cpp:24:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |   for (int i = 0; i < nodes[me].size(); i++) {
      |                   ~~^~~~~~~~~~~~~~~~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:38:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |  for (int i = 0; i < u.size(); i++) {
      |                  ~~^~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:56:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |   for (int i = 0; i < c.size(); i++) {
      |                   ~~^~~~~~~~~~
stations.cpp:73:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |   for (int i = 1; i < c.size(); i++) {
      |                   ~~^~~~~~~~~~

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