Submission #160891

#	Time	Username	Problem	Language	Result	Execution time	Memory
160891		MohamedAhmed04	Longest beautiful sequence (IZhO17_subsequence)	C++14	40 / 100	6104 ms	88364 KiB

subsequence

#include <bits/stdc++.h>
 
using namespace std ;
 
const int MAX = 1e5 + 10 ;
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]) ;
	printf("%d " , now) ;
}
 
int main()
{
	int n ;
	scanf("%d" , &n) ;
	for(int i = 1 ; i <= n ; ++i)
		scanf("%d" , &arr[i]) ;
	for(int i = 1 ; i <= n ; ++i)
		scanf("%d" , &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 = __builtin_popcount((vall & j)) ;
			if(x > arr2[i])
				continue ;
			if(dp[f[j][valr][arr2[i] - x]] + 1 > dp[i])
				dp[i] = dp[f[j][valr][arr2[i] - x]] + 1 , prv[i] = f[j][valr][arr2[i] - 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 ;
	}
	printf("%d\n" , Max) ;
	print(en) ;
	return 0 ;
}

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:20:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d" , &n) ;
  ~~~~~^~~~~~~~~~~
subsequence.cpp:22:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d" , &arr[i]) ;
   ~~~~~^~~~~~~~~~~~~~~~
subsequence.cpp:24:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d" , &arr2[i]) ;
   ~~~~~^~~~~~~~~~~~~~~~~
subsequence.cpp:13:7: warning: 'en' may be used uninitialized in this function [-Wmaybe-uninitialized]
  print(prv[now]) ;
  ~~~~~^~~~~~~~~~
subsequence.cpp:25:16: note: 'en' was declared here
  int Max = 0 , en , vall , valr , x;
                ^~

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