Submission #735593

#	Time	Username	Problem	Language	Result	Execution time	Memory
735593		tigar	Bosses (BOI16_bosses)	C++14	100 / 100	629 ms	852 KiB

bosses

#include <bits/stdc++.h>

using namespace std;

int n;
vector<int>graff[5050];
bool check[5050];
vector<pair<int, int> >ord;
int reezz=0, ans=INT_MAX, brr=0;

void bfs(int v, int br)
{
    //cout<<v<<endl;
    if(check[v] and br!=ord.size()){bfs(ord[br].first, br+1); return;}
    else if(check[v] and br==ord.size())return;
    check[v]=true;
    brr++;
    if(br==0)reezz+=1;
    else reezz+=ord[br-1].second;
    for(int i=0; i<graff[v].size(); i++)
    {
        if(!check[graff[v][i]] and br!=0){ord.push_back({graff[v][i], ord[br-1].second+1}); /*tree[v].push_back(graff[v][i]);*/}
        else if (!check[graff[v][i]] and br==0)ord.push_back({graff[v][i], 2});
    }
    if(br==ord.size())return;

    bfs(ord[br].first, br+1);
}

int main()
{
    ios_base::sync_with_stdio(false);
    //cin.tie(0); cout.tie(0);

    cin>>n;
    for(int i=1; i<=n; i++)
    {
        int k; cin>>k;
        for(int j=0; j<k; j++)
        {
            int a; cin>>a;
            graff[a].push_back(i);
        }
    }
    for(int i=1; i<=n; i++)
    {
        reezz=0; brr=0;
        for(int i=1; i<=n; i++)check[i]=false;
        ord.clear();
        bfs(i, 0);
        if(brr==n)ans=min(ans, reezz);
    }
    cout<<ans;
    return 0;
}
/*4
1 2
1 1
1 1
1 1
9*/

Compilation message (stderr)

bosses.cpp: In function 'void bfs(int, int)':
bosses.cpp:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     if(check[v] and br!=ord.size()){bfs(ord[br].first, br+1); return;}
      |                     ~~^~~~~~~~~~~~
bosses.cpp:15:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     else if(check[v] and br==ord.size())return;
      |                          ~~^~~~~~~~~~~~
bosses.cpp:20:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(int i=0; i<graff[v].size(); i++)
      |                  ~^~~~~~~~~~~~~~~~
bosses.cpp:25:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     if(br==ord.size())return;
      |        ~~^~~~~~~~~~~~

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