Submission #824276

#	Time	Username	Problem	Language	Result	Execution time	Memory
824276		AlphaMale06	Bosses (BOI16_bosses)	C++14	100 / 100	841 ms	900 KiB

bosses

#include <bits/stdc++.h>
#define pb push_back
using namespace std;

const int N=5005;
vector<int> adj[N];
vector<int> adj1[N];
bool mark[N];
int ans=0;
int cnt=0;

int dfs(int node, int p){
    int ret=1;
    for(auto to : adj1[node]){
        if(to!=p){
            ret+=dfs(to, node);
        }
    }
    ans+=ret;
    return ret;
}

void bfs(int node){
    mark[node]=true;
    cnt=1;
    int sum=1;
    queue<int> q;
    q.push(node);
    while(!q.empty()){
        int nd=q.front();
        for(auto to : adj[nd]){
            if(!mark[to]){
                q.push(to);
                mark[to]=true;
                adj1[nd].pb(to);
                cnt++;
            }
        }
        q.pop();
    }
    dfs(node, -1);
}


void clearmark(int n){
    for(int i=1; i<= n; i++){
        mark[i]=0;
        adj1[i].clear();
    }
}
int main()
{
    int n;
    cin >> n;
    for(int i=0; i< n; i++){
        int k;
        cin >> k;
        for(int j=0; j< k; j++){
            int kita;
            cin >> kita;
            adj[kita].pb(i+1);
        }
    }
    int mn=1e9;
    for(int i=1; i<=n; i++){
        bfs(i);
        if(cnt==n)mn=min(mn, ans);
        clearmark(n+1);
        ans=0;
    }
    cout << mn << '\n';
}

Compilation message (stderr)

bosses.cpp: In function 'void bfs(int)':
bosses.cpp:26:9: warning: unused variable 'sum' [-Wunused-variable]
   26 |     int sum=1;
      |         ^~~

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