Submission #791081

#	Time	Username	Problem	Language	Result	Execution time	Memory
791081		AndiR	Bosses (BOI16_bosses)	C++14	100 / 100	964 ms	652 KiB

bosses

#include <iostream>
#include <fstream>
#include <vector>
#include <queue>

using namespace std;
ifstream fin ("bos.in");
ofstream fout ("bos.out");
typedef long long ll;
const int Nmax=5000;

int n;
bool vis[Nmax];
vector <pair<int, bool>> ad[Nmax];
queue <int> q;
ll sol, mn=(ll)99999999999999999;
int dfs(int nod){
    int s=1;
    for (int i=0; i<ad[nod].size(); i++){
        if (ad[nod][i].second==1){
            ad[nod][i].second=0;
            s+=dfs(ad[nod][i].first);
        }
    }
    sol+=s;
    return s;
}
int main()
{
    cin>>n;
    int m, a;
    for (int i=0; i<n; i++){
        cin>>m;
        for (int j=0; j<m; j++){
            cin>>a; a--;
            ad[a].push_back({i, 0});
        }
    }
    for (int i=0; i<n; i++){
        sol=0;
        vis[i]=1;
        q.push(i);
        while (!q.empty()){
            for (int j=0; j<ad[q.front()].size(); j++){
                if (vis[ad[q.front()][j].first]==0){
                    q.push(ad[q.front()][j].first);
                    vis[ad[q.front()][j].first]=1;
                    ad[q.front()][j].second=1;
                }
            }
            q.pop();
        }
        bool ok=1;
        for (int i=0; i<n; i++){
            if (vis[i]==0)
                ok=0;
            vis[i]=0;
        }
        dfs(i);
        if (sol<mn && ok)
            mn=sol;
    }
    cout<<mn;
    return 0;
}

Compilation message (stderr)

bosses.cpp: In function 'int dfs(int)':
bosses.cpp:19:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for (int i=0; i<ad[nod].size(); i++){
      |                   ~^~~~~~~~~~~~~~~
bosses.cpp: In function 'int main()':
bosses.cpp:44:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |             for (int j=0; j<ad[q.front()].size(); j++){
      |                           ~^~~~~~~~~~~~~~~~~~~~~

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