Submission #780958

#	Time	Username	Problem	Language	Result	Execution time	Memory
780958		1075508020060209tc	Bosses (BOI16_bosses)	C++14	100 / 100	1018 ms	15056 KiB

bosses

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define X first
#define Y second
int n;
vector<int>pch[200005];
vector<int>pfa[200005];
vector<int>e[200005];
int dp[200005];
int vis[200005];
int ans;

void dfs(int nw){
dp[nw]=1;
for(int i=0;i<e[nw].size();i++){
    int v=e[nw][i];
    dfs(v);
    dp[nw]+=dp[v];
}
}

void solve(int rt){
for(int i=1;i<=n;i++){
    vis[i]=0;
    dp[i]=0;
    e[i].clear();
}
vis[rt]=1;
queue<int>q;
q.push(rt);
while(q.size()){
    int nw=q.front();
    q.pop();
    for(int i=0;i<pch[nw].size();i++){
        int v=pch[nw][i];
        if(vis[v]){continue;}
        e[nw].push_back(v);
        vis[v]=1;
        q.push(v);
    }
}
for(int i=1;i<=n;i++){
    if(vis[i]==0){return;}
}
dfs(rt);
int cal=0;
for(int i=1;i<=n;i++){
    cal+=dp[i];
}
ans=min(ans,cal);
}


signed main(){
cin>>n;
for(int i=1;i<=n;i++){
    int k;
    cin>>k;
    for(int j=1;j<=k;j++){
        int v;
        cin>>v;
        pfa[i].push_back(v);
        pch[v].push_back(i);
    }
}
ans=1e18;
for(int i=1;i<=n;i++){
    solve(i);
}
cout<<ans<<endl;

}

Compilation message (stderr)

bosses.cpp: In function 'void dfs(long long int)':
bosses.cpp:16:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 | for(int i=0;i<e[nw].size();i++){
      |             ~^~~~~~~~~~~~~
bosses.cpp: In function 'void solve(long long int)':
bosses.cpp:35:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |     for(int i=0;i<pch[nw].size();i++){
      |                 ~^~~~~~~~~~~~~~~

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