oj.uz

Submission #197171

# Submission time Handle Problem Language Result Execution time Memory
197171 2020-01-19T13:18:33 Z arnold518 Political Development (BOI17_politicaldevelopment) C++14
4 / 100
 122 ms 7800 KB 
#include <bits/stdc++.h>
using namespace std;

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

const int MAXN = 5e4;

int N, K, ans=1;
set<int> adj[MAXN+10];
vector<int> adj2[MAXN+10];
bool vis[MAXN+10];

int main()
{
	int i, j, k, p;
	scanf("%d%d", &N, &K);
	for(i=1; i<=N; i++)
	{
		int s;
		scanf("%d", &s);
		while(s--) { int t; scanf("%d", &t); adj[i].insert(t+1); }
	}

	while(1)
	{
		pii t(987654321, 0);
		for(i=1; i<=N; i++) if(!vis[i]) t=min(t, pii(adj[i].size(), i));
		if(t.second==0) break;
		int now=t.second;

		vector<int> chd;
		for(auto it : adj[now]) chd.push_back(it);

		for(auto it : chd) for(auto jt : chd) if(adj[it].find(it)!=adj[it].end()) adj2[it].push_back(jt);

		for(i=0; i<(1<<chd.size()); i++)
		{
			vector<int> V;
			for(j=0; j<chd.size(); j++) if(i&(1<<j)) V.push_back(chd[j]);
			bool flag=true;
			for(j=0; j<V.size(); j++)
			{
				for(k=j+1, p=0; k<V.size(); k++)
				{
					for(; p<adj2[V[j]].size() && adj2[V[j]][p]<V[k]; p++);
					if(adj2[V[j]][p]!=V[k]) flag=false;
				}
			}
			if(flag) ans=max(ans, (int)V.size()+1); 
		}
		vis[now]=true;
		for(auto it : chd) adj2[it].clear();
		for(auto it : chd) adj[it].erase(now);
		adj[now].clear();
	}
	printf("%d", ans);
}

Compilation message

politicaldevelopment.cpp: In function 'int main()':
politicaldevelopment.cpp:41:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(j=0; j<chd.size(); j++) if(i&(1<<j)) V.push_back(chd[j]);
             ~^~~~~~~~~~~
politicaldevelopment.cpp:43:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(j=0; j<V.size(); j++)
             ~^~~~~~~~~
politicaldevelopment.cpp:45:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(k=j+1, p=0; k<V.size(); k++)
                     ~^~~~~~~~~
politicaldevelopment.cpp:47:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(; p<adj2[V[j]].size() && adj2[V[j]][p]<V[k]; p++);
            ~^~~~~~~~~~~~~~~~~~
politicaldevelopment.cpp:18:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &K);
  ~~~~~^~~~~~~~~~~~~~~~
politicaldevelopment.cpp:22:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &s);
   ~~~~~^~~~~~~~~~
politicaldevelopment.cpp:23:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   while(s--) { int t; scanf("%d", &t); adj[i].insert(t+1); }
                       ~~~~~^~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 3832 KB Output is correct
2 Correct 5 ms 3832 KB Output is correct
3 Correct 122 ms 4344 KB Output is correct
4 Correct 51 ms 4344 KB Output is correct
5 Correct 52 ms 4472 KB Output is correct
6 Correct 58 ms 4364 KB Output is correct
7 Correct 57 ms 4344 KB Output is correct
8 Correct 46 ms 3832 KB Output is correct
9 Correct 5 ms 3832 KB Output is correct
10 Correct 46 ms 3832 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 3832 KB Output is correct
2 Correct 5 ms 3832 KB Output is correct
3 Correct 122 ms 4344 KB Output is correct
4 Correct 51 ms 4344 KB Output is correct
5 Correct 52 ms 4472 KB Output is correct
6 Correct 58 ms 4364 KB Output is correct
7 Correct 57 ms 4344 KB Output is correct
8 Correct 46 ms 3832 KB Output is correct
9 Correct 5 ms 3832 KB Output is correct
10 Correct 46 ms 3832 KB Output is correct
11 Correct 51 ms 4444 KB Output is correct
12 Correct 46 ms 4344 KB Output is correct
13 Runtime error 17 ms 7800 KB Execution killed with signal 11 (could be triggered by violating memory limits)
14 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 3832 KB Output is correct
2 Runtime error 10 ms 7544 KB Execution killed with signal 11 (could be triggered by violating memory limits)
3 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 3832 KB Output is correct
2 Correct 5 ms 3832 KB Output is correct
3 Correct 122 ms 4344 KB Output is correct
4 Correct 51 ms 4344 KB Output is correct
5 Correct 52 ms 4472 KB Output is correct
6 Correct 58 ms 4364 KB Output is correct
7 Correct 57 ms 4344 KB Output is correct
8 Correct 46 ms 3832 KB Output is correct
9 Correct 5 ms 3832 KB Output is correct
10 Correct 46 ms 3832 KB Output is correct
11 Correct 51 ms 4444 KB Output is correct
12 Correct 46 ms 4344 KB Output is correct
13 Runtime error 17 ms 7800 KB Execution killed with signal 11 (could be triggered by violating memory limits)
14 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 3832 KB Output is correct
2 Correct 5 ms 3832 KB Output is correct
3 Correct 122 ms 4344 KB Output is correct
4 Correct 51 ms 4344 KB Output is correct
5 Correct 52 ms 4472 KB Output is correct
6 Correct 58 ms 4364 KB Output is correct
7 Correct 57 ms 4344 KB Output is correct
8 Correct 46 ms 3832 KB Output is correct
9 Correct 5 ms 3832 KB Output is correct
10 Correct 46 ms 3832 KB Output is correct
11 Correct 51 ms 4444 KB Output is correct
12 Correct 46 ms 4344 KB Output is correct
13 Runtime error 17 ms 7800 KB Execution killed with signal 11 (could be triggered by violating memory limits)
14 Halted 0 ms 0 KB -