제출 #90114

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
90114		Aydarov03	아름다운 순열 (IZhO12_beauty)	C++14	0 / 100	575 ms	580 KiB

beauty

#include <bits/stdc++.h>
#define int long long
using namespace std;
int a[30];
int st[30];
bool used[30];
int n , ans;
int was[ 30 ][ 30 ];

map <int,int> bin;
map <int,int> ter;



void rec( int k )
{

	if( k == n + 1 )
	{
		ans++;
		return;
	}
	
	int ls = ans;
	
	for(int i = 1; i <= n; i++)
	{
		if( k == 1 || ( !used[i] && ( ter[a[i]] == ter[st[k-1]] || bin[a[i]] == bin[st[k-1]] ) )  )
		{	
			st[k] = a[i];
			used[ i ] = true;
			rec( k + 1 );
			
			if( ls != ans )
			{
				int sm = a[i];
				int raz = ans - ls;
				while( 1 )
				{
					i++;
					if( sm == a[i] )ans += raz;
					else break;
				}
				i--;
			}
			
			used[ i ] = false;
		}
	}
}

void to_bin( int a )
{
	int one = 0;
	int A = a;

	while( a > 0 )
	{
		one += ( a % 2 == 1);
		a /= 2;
	}

	bin[ A ] = one;
}

void to_ter( int a )
{
		int one = 0;
		int A = a;
		while( a > 0 )
		{
			one += ( a % 3 == 1);
			a /= 3;
		}

	ter[ A ] = one;
}





main()
{
	scanf("%lld" , &n);
	for(int i = 1; i <= n; i++)scanf("%lld" , &a[i]);
	sort( a + 1 , a + n + 1 );



	for(int i = 1; i <= n; i++)
	{
		to_bin( a[i] );
		to_ter( a[i] );
	}
	
	
	rec(1);
	
	
	printf("%lld" , ans);

}	

컴파일 시 표준 에러 (stderr) 메시지

beauty.cpp:83:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
beauty.cpp: In function 'int main()':
beauty.cpp:85:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld" , &n);
  ~~~~~^~~~~~~~~~~~~
beauty.cpp:86:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 1; i <= n; i++)scanf("%lld" , &a[i]);
                             ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100