Submission #851140

#	Time	Username	Problem	Language	Result	Execution time	Memory
851140		Benmath	Bosses (BOI16_bosses)	C++14	100 / 100	965 ms	1332 KiB

bosses

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#include <bits/stdc++.h>

using namespace std;
int n;
vector<int> v[5010];
int vis[5010];
int vis_dfs[5010];
int subtree[5010];
vector<int> adjl[5010];
vector<int> adjlpravi[5010];
int brojac = 0;
int brojac_posj = 0;
void dfs (int s){
    vis_dfs[s]++;
    subtree[s]++;
    for(int i = 0; i < adjl[s].size(); i++){
        if(vis_dfs[adjl[s][i]] == 0){
            dfs(adjl[s][i]);
            subtree[s] += subtree[adjl[s][i]];
            
        }
    }
    brojac = brojac + subtree[s];
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n;
    for (int i = 1; i <= n; i++){
        int x;
        cin >> x;
        for(int j = 0;j < x;j++){
            int y;
            cin >> y;
            v[i].push_back(y);
            adjlpravi[y].push_back(i);
        }
    }
    int ans = 1e9;
    
    for(int i = 1; i <= n; i++){
        brojac_posj = 0;
        for(int j = 1; j <= n; j++){
            vis[j] = 0;
            vis_dfs[j] = 0;
            subtree[j] = 0;
            adjl[j].clear();
        }
        vis[i]++;
     
        brojac = 0;
        queue<int>q;
        q.push(i);
      
        while (!q.empty()){
            int a = q.front();
            brojac_posj++;
            q.pop();
            for (int j = 0; j < adjlpravi[a].size(); j++){
                if(vis[adjlpravi[a][j]] == 0){
                    adjl[a].push_back(adjlpravi[a][j]);
                    vis[adjlpravi[a][j]]++;
                    q.push(adjlpravi[a][j]);
                }
            }
    
             
            
        }
        if(brojac_posj == n){
        dfs (i);
        ans = min(ans, brojac);
        }
        
        
        
    }
    cout << ans;
}

Compilation message (stderr)

bosses.cpp: In function 'void dfs(int)':
bosses.cpp:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i = 0; i < adjl[s].size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~
bosses.cpp: In function 'int main()':
bosses.cpp:68:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |             for (int j = 0; j < adjlpravi[a].size(); j++){
      |                             ~~^~~~~~~~~~~~~~~~~~~~~

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