제출 #924415

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
924415		Faisal_Saqib	Political Development (BOI17_politicaldevelopment)	C++17	0 / 100	8 ms	31324 KiB

politicaldevelopment

#include <iostream>
#include <bitset> 
// any
using namespace std;
const int N=5e4;
bitset<N> ma[N];
int n,k,mx=0;
void recur(int& sz,bitset<N>&x)
{
	mx=max(mx,sz);	
	if(x.none())
		return;
	sz++;
	bitset<N> np=x;
	for(int l=x._Find_first();l<x.size();l=x._Find_next(l))
	{
		x=(np&ma[l]);
		recur(sz,x);
	}
	sz--;
}
int main()
{
	cin.tie(0);
	cout.tie(0);
	ios::sync_with_stdio(0);
	scanf("%d %d",&n,&k);
	for(int i=0;i<n;i++)
	{
		int d=0;
		scanf("%d",&d);
		while(d--)
		{
			int x;
			scanf("%d",&x);
			ma[i].set(x);
		}
	}
	bitset<N> tp;
	for(int i=0;i<n;i++)
		tp[i]=1;
	int s=0;		
	recur(s,tp);
	printf("%d",mx);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

politicaldevelopment.cpp: In function 'void recur(int&, std::bitset<50000>&)':
politicaldevelopment.cpp:15:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::size_t' {aka 'long unsigned int'} [-Wsign-compare]
   15 |  for(int l=x._Find_first();l<x.size();l=x._Find_next(l))
      |                            ~^~~~~~~~~
politicaldevelopment.cpp: In function 'int main()':
politicaldevelopment.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |  scanf("%d %d",&n,&k);
      |  ~~~~~^~~~~~~~~~~~~~~
politicaldevelopment.cpp:31:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |   scanf("%d",&d);
      |   ~~~~~^~~~~~~~~
politicaldevelopment.cpp:35:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |    scanf("%d",&x);
      |    ~~~~~^~~~~~~~~

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