Submission #533844

#	Time	Username	Problem	Language	Result	Execution time	Memory
533844		groshi	Bosses (BOI16_bosses)	C++17	100 / 100	776 ms	716 KiB

bosses

#include<iostream>
#include<vector>
#include<queue>
#include<utility>
using namespace std;
struct wi{
    vector<int> Q;
    int odw=0;
}*w;
long long wynik=1e18;
int kiedy=0;
int ile=0;
long long mam=0;
void bfs(int x)
{
    queue<pair<int,long long> > kolejka;
    w[x].odw=x;
    kolejka.push({x,1});
    while(!kolejka.empty())
    {
        pair<int,long long> para=kolejka.front();
        kolejka.pop();
        ile++;
        mam+=para.second;
        for(int i=0;i<w[para.first].Q.size();i++)
        {
            int pom=w[para.first].Q[i];
            if(w[pom].odw==x)
                continue;
            w[pom].odw=x;
            kolejka.push({pom,para.second+1});
        }
    }
}
int main()
{
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
    int n,s,x;
    cin>>n;
    w=new wi[n+3];
    for(int i=1;i<=n;i++)
    {
        cin>>s;
        for(int j=0;j<s;j++)
        {
            cin>>x;
            w[x].Q.push_back(i);
        }
    }
    for(int i=1;i<=n;i++)
    {
        kiedy=i;
        ile=0;
        mam=0;
        bfs(i);
        if(ile!=n)
            continue;
        wynik=min(wynik,mam);
    }
    cout<<wynik;
    return 0;
}

Compilation message (stderr)

bosses.cpp: In function 'void bfs(int)':
bosses.cpp:25:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |         for(int i=0;i<w[para.first].Q.size();i++)
      |                     ~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 33 / 33