Submission #218430

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
218430	2020-04-02 07:19:51	GioChkhaidze	Capital City (JOI20_capital_city)	C++14	100 / 100	876 ms	35056 KiB

capital_city

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#include <bits/stdc++.h>
#define pb push_back
using namespace std;
const int N=2e5+5;
int n,k,ans=1e9;
bool f[N],fix[N],lvl[N];
int c[N],P[N],Cf[N];
vector < int > v[N],s[N],h;
int Dfs(int x,int p,int sz,int &center) {
  int tot=1;
  Cf[c[x]]++;
  h.pb(x);
  for (int i=0; i<v[x].size(); i++) {
    int to=v[x][i];
    if (!lvl[to] && to!=p) 
      tot+=Dfs(to,x,sz,center); 
  }
  if (center==-1 && (2*tot>=sz || !p)) center=x;
  return tot;
}
void Go(int x,int p) {
  P[x]=p;
  for (int i=0; i<v[x].size(); i++) {
    int to=v[x][i];
    if (!lvl[to] && to!=p) Go(to,x);
  }
}
 
 
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Compilation message (stderr)

capital_city.cpp: In function 'int Dfs(int, int, int, int&)':
capital_city.cpp:15:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<v[x].size(); i++) {
                ~^~~~~~~~~~~~
capital_city.cpp: In function 'void Go(int, int)':
capital_city.cpp:26:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<v[x].size(); i++) {
                ~^~~~~~~~~~~~
capital_city.cpp: In function 'void Build(int, int)':
capital_city.cpp:45:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (s[c[x]].size()!=Cf[c[x]]) {
       ~~~~~~~~~~~~~~^~~~~~~~~~
capital_city.cpp:54:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int i=0; i<s[c[x]].size(); i++) 
                  ~^~~~~~~~~~~~~~~
capital_city.cpp:61:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<h.size(); i++) {
                ~^~~~~~~~~
capital_city.cpp:67:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<v[center].size(); i++) {
                ~^~~~~~~~~~~~~~~~~
capital_city.cpp: At global scope:
capital_city.cpp:73:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main () {
       ^

• Subtask 1: 1 / 1
• Subtask 2: 10 / 10
• Subtask 3: 30 / 30
• Subtask 4: 59 / 59