Submission #973892

#	Time	Username	Problem	Language	Result	Execution time	Memory
973892		KasymK	Bosses (BOI16_bosses)	C++17	100 / 100	860 ms	1264 KiB

bosses

#include "bits/stdc++.h"

using namespace std;

int n;

const int N = 5e3 + 5;

vector<int> adj[N];
vector<int> taze_adj[N];

int vis[N], node_sany[N];

void dfs(int x){
    node_sany[x] = 1;
    for(auto to : taze_adj[x]){
        dfs(to);
        node_sany[x] += node_sany[to];
    }
}

int kok(int x){
    for(int i = 1; i <= n; ++i){
        vis[i] = 0;
        node_sany[i] = 0;
        taze_adj[i].clear();
    }
    queue<int> q;
    q.push(x);
    vis[x] = 1;
    while(!q.empty()){
        int id = q.front();
        q.pop();
        for(auto to : adj[id])
            if(!vis[to]){
                vis[to] = 1;
                taze_adj[id].push_back(to);
                q.push(to);
            }
    }
    for(int i = 1; i <= n; ++i)
        if(!vis[i])
            return -1;
    // eger birini hem gormedik bolsam, onda yalnysh bolyar
    dfs(x);
    int ret = 0;
    for(int i = 1; i <= n; ++i)
        ret += node_sany[i];
    return ret;
}

int main(){
    scanf("%d", &n);
    for(int i = 1; i <= n; ++i){
        int K;
        scanf("%d", &K);
        while(K--){
            int A;
            scanf("%d", &A);
            adj[A].push_back(i);
        }
    }
    int ans = INT_MAX;
    for(int i = 1; i <= n; ++i){
        int kk = kok(i);
        if(~kk)
            ans = min(ans, kk);
    }
    printf("%d\n", ans);
    return 0;
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
bosses.cpp:56:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |         scanf("%d", &K);
      |         ~~~~~^~~~~~~~~~
bosses.cpp:59:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |             scanf("%d", &A);
      |             ~~~~~^~~~~~~~~~

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