Submission #124787

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
124787	2019-07-04 02:00:26	model_code	Railway (BOI17_railway)	C++17	100 / 100	267 ms	35572 KiB

railway

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#include<iostream>
#include<vector>
#include<unordered_map>
#include<cstdio>
#include<algorithm>
#include <cassert>
using namespace std;
int n, m, k;
vector<vector<int> > T, ID, ministersInCity;
vector<int> biggestChild, passiveMinisters, onDFSStack, ministerNumCities, importantTracks;
void initialize() {
  scanf("%d%d%d", &n, &m, &k);
    
    passiveMinisters = vector<int> (n, 0); 
    biggestChild = vector<int> (n, -1);
    
  //onDFSStack = vector<bool> (n, false);
  for(int i = 0; i < n; ++i) onDFSStack.push_back(false);
      
  T = vector<vector<int> > (n, vector<int>());
  ID = vector<vector<int> > (n, vector<int>());
  ministersInCity = vector<vector<int> > (n, vector<int>());
        
    for(int i = 1; i <= n-1; ++i) {
      int u, v;
    scanf("%d%d", &u, &v);
      T[--u].push_back(--v);
 
 
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Compilation message (stderr)

railway.cpp: In function 'int makeBiggestChildDFS(int)':
railway.cpp:54:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < T[pos].size(); ++i) {
                 ~~^~~~~~~~~~~~~~~
railway.cpp: In function 'void DFS(int, int, std::unordered_map<int, int>&)':
railway.cpp:78:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(bigChildPos = 0; bigChildPos < T[pos].size(); ++bigChildPos) {if(T[pos][bigChildPos] == biggestChild[pos]) break;}
                        ~~~~~~~~~~~~^~~~~~~~~~~~~~~
railway.cpp:86:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < T[pos].size(); ++i) {
                 ~~^~~~~~~~~~~~~~~
railway.cpp:106:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < ministersInCity[pos].size(); ++i) {
                    ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
railway.cpp:113:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(ministers.size() - passiveMinisters[pos] >= k) importantTracks.push_back(edgeID);
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
railway.cpp: In function 'int main()':
railway.cpp:125:42: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=]
     printf("%d\n", importantTracks.size()); 
                    ~~~~~~~~~~~~~~~~~~~~~~^
railway.cpp:127:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i + 1 < importantTracks.size(); ++i) {printf("%d ", importantTracks[i]);}  
                    ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
railway.cpp: In function 'void initialize()':
railway.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &n, &m, &k);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~
railway.cpp:29:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &u, &v);
   ~~~~~^~~~~~~~~~~~~~~~
railway.cpp:39:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &si);
   ~~~~~^~~~~~~~~~~
railway.cpp:44:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &city);
    ~~~~~^~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 15 / 15
• Subtask 3: 7 / 7
• Subtask 4: 29 / 29
• Subtask 5: 16 / 16
• Subtask 6: 25 / 25