제출 #160899

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
160899		MohamedAhmed04	Longest beautiful sequence (IZhO17_subsequence)	C++14	40 / 100	6057 ms	89220 KiB

subsequence

#include <bits/stdc++.h>
 
using namespace std ;
 
const int MAX = 1e5 + 1 ;
const int Middle = 1 << 10 ;
int arr[MAX] , arr2[MAX] , f[Middle][Middle][21] , prv[MAX] , dp[MAX] ;

void print(int now)
{
	if(now == 0)
		return ;
	print(prv[now]) ;
	cout<<now<<" " ;
}

int main()
{
	ios_base::sync_with_stdio(0) ;
	cin.tie(0) ;
	int n ;
	cin>>n ;
	for(int i = 1 ; i <= n ; ++i)
		cin>>arr[i] ;
	for(int i = 1 ; i <= n ; ++i)
		cin>>arr2[i] ;
	int Max = 0 , en , vall , valr , x;
	for(int i = 1 ; i <= n ; ++i)
	{
		dp[i] = 1 ;
		vall = arr[i] & (Middle - 1);
        valr = arr[i] >> 10;
		for(int j = 0 ; j < Middle ; ++j)
		{
			x = arr2[i] - __builtin_popcount(vall & j) ;
			if(x < 0)
				continue ;
			if(dp[f[j][valr][x]] + 1 > dp[i])
			{
				dp[i] = dp[f[j][valr][x]] + 1 ;
				prv[i] = f[j][valr][x] ;
			}
		}
		for(int j = 0 ; j < Middle ; ++j)
		{
			x = __builtin_popcount((valr & j)) ;
			if(dp[i] > dp[f[vall][j][x]])
				f[vall][j][x] = i ;
		}
		if(dp[i] > Max)
			Max = dp[i] , en = i ;
	}
	cout<<Max<<"\n" ;
	print(en) ;
	return 0 ;
}

컴파일 시 표준 에러 (stderr) 메시지

subsequence.cpp: In function 'int main()':
subsequence.cpp:27:16: warning: 'en' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int Max = 0 , en , vall , valr , x;
                ^~

• Subtask 1: 7 / 7
• Subtask 2: 16 / 16
• Subtask 3: 17 / 17
• Subtask 4: 0 / 60