Submission #235458

#	Time	Username	Problem	Language	Result	Execution time	Memory
235458		anonymous	Bosses (BOI16_bosses)	C++14	100 / 100	760 ms	760 KiB

bosses

#include <iostream>
#include <queue>
#include <vector>
#define MAXN 5005
using namespace std;
int N, Ans=1<<30, Val, ki, dist[MAXN];
vector <int> adj[MAXN];
queue <int> Q;
int main() {
    //freopen("bossin.txt","r",stdin);
    scanf("%d",&N);
    for (int i=1; i<=N; i++) {
        scanf("%d", &ki);
        for (int j=0; j<ki; j++) {
            int ai;
            scanf("%d",&ai);
            adj[ai].push_back(i);
        }
    }
    for (int i=1; i<=N; i++) {
        for (int j=1; j<=N; j++) {
            dist[j] = i == j ? 1 : 1<<30;
        }
        Val = 0;
        Q.push(i);
        int vis = 0;
        while (Q.size()) {
            int u = Q.front();
            vis++;
            Q.pop();
            Val += dist[u];
            for (int v: adj[u]) {
                if (dist[v] > dist[u] + 1) {
                    dist[v] = dist[u] + 1;
                    Q.push(v);
                }
            }
        }
        if (vis == N) {Ans = min(Ans, Val);}
    }
    printf("%d",Ans);
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&N);
     ~~~~~^~~~~~~~~
bosses.cpp:13:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &ki);
         ~~~~~^~~~~~~~~~~
bosses.cpp:16:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&ai);
             ~~~~~^~~~~~~~~~

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