Submission #260286

#	Time	Username	Problem	Language	Result	Execution time	Memory
260286		arnold518	Bosses (BOI16_bosses)	C++14	100 / 100	710 ms	888 KiB

bosses

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

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 5000;

int N;
vector<int> adj[MAXN+10];
int dist[MAXN+10];

int main()
{
	scanf("%d", &N);
	for(int i=1; i<=N; i++)
	{
		int p;
		scanf("%d", &p);
		while(p--)
		{
			int v;
			scanf("%d", &v);
			adj[v].push_back(i);
		}
	}

	ll ans=1e18;
	for(int i=1; i<=N; i++)
	{
		memset(dist, 0, sizeof(dist));
		queue<int> Q;
		Q.push(i); dist[i]=1;
		while(!Q.empty())
		{
			int now=Q.front(); Q.pop();
			for(auto nxt : adj[now])
			{
				if(dist[nxt]) continue;
				dist[nxt]=dist[now]+1; Q.push(nxt);
			}
		}
		ll t=0;
		for(int i=1; i<=N; i++)
		{
			if(dist[i]==0) t=1e18;
			t+=dist[i];
		}
		ans=min(ans, t);
	}
	printf("%lld\n", ans);
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:16:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
bosses.cpp:20:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &p);
   ~~~~~^~~~~~~~~~
bosses.cpp:24:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &v);
    ~~~~~^~~~~~~~~~

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