Submission #589556

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
589556	2022-07-04 21:04:27	jasmin	Newspapers (CEOI21_newspapers)	C++14	100 / 100	66 ms	8876 KiB

newspapers

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#include<bits/stdc++.h>
using namespace std;
#define int long long 
pair<int,int> farthest(int v, vector<vector<int> >& adi, vector<int>& p){
    pair<int,int> mmax={0, v};
    for(auto u: adi[v]){
        if(u!=p[v]){
            p[u]=v;
            mmax=max(mmax, farthest(u, adi, p));
        }
    }
    return {mmax.first+1, mmax.second};
}
vector<int> diameter(int n, vector<vector<int> >& adi){
    vector<int> p(n, -1);
    int root=farthest(0, adi, p).second;
    p.assign(n, -1);
    int v=farthest(root, adi, p).second;
    vector<int> d;
    d.push_back(v);
    while(v!=root){
        v=p[v];
        d.push_back(v);
    }
    return d;
}
 
 
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Compilation message (stderr)

newspapers.cpp: In function 'int main()':
newspapers.cpp:74:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |     for(int i=0; i<d.size()-1; i++){
      |                  ~^~~~~~~~~~~
newspapers.cpp:82:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |     for(int i=1; i<d.size()-1; i++){
      |                  ~^~~~~~~~~~~
newspapers.cpp:104:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |         for(int i=0; i<a.size(); i++){
      |                      ~^~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 8 / 8
• Subtask 3: 80 / 80