Submission #49480

#	Time	Username	Problem	Language	Result	Execution time	Memory
49480		rzbt	Bosses (BOI16_bosses)	C++14	67 / 100	1565 ms	1336 KiB

bosses

#include <bits/stdc++.h>
#define MAXN 5005
#define pb push_back
using namespace std;

int n;
vector<int> niz[MAXN];
vector<int> cudni[MAXN];

queue<int> q;
int posecen[MAXN];
int tp;
void bfs(int s){
    int t;

    for(int i=1;i<=n;i++)
        if(!cudni[i].empty())
            cudni[i].clear();
    tp=0;
    q.push(s);
    posecen[s]=s;
    while(!q.empty()){
        tp++;
        t=q.front();
        q.pop();
        for(auto x:niz[t]){
            if(posecen[x]==s)continue;
            cudni[t].pb(x);
            posecen[x]=s;
            q.push(x);
        }
    }

}

int res=1e9;
int ucena;
int dfs(int t){

    int cena=1;
    for(auto x:cudni[t])
        cena+=dfs(x);

    ucena+=cena;
    return cena;

}

int main()
{
    scanf("%d", &n);
    for(int i=1;i<=n;i++){
        int tk;
        scanf("%d", &tk);
        for(int j=0;j<tk;j++){
            int t;
            scanf("%d", &t);
            niz[t].pb(i);
        }
    }
    for(int i=1;i<=n;i++){
        bfs(i);

        if(tp!=n)continue;

        ucena=0;
        dfs(i);
        res=min(res,ucena);
    }
    printf("%d",res);
    return 0;
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
bosses.cpp:54:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &tk);
         ~~~~~^~~~~~~~~~~
bosses.cpp:57:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &t);
             ~~~~~^~~~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 0 / 33