제출 #485279

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
485279		errorgorn	Dojave (COCI17_dojave)	C++17	42 / 140	94 ms	10684 KiB

dojave

//雪花飄飄北風嘯嘯
//天地一片蒼茫

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << ": " << x << endl

#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define lb lower_bound
#define ub upper_bound

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

int n;
int arr[1100000];
bool cnt[1100000];
bool f[1100000];

vector<int> v;

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	cin>>n;
	rep(x,0,1<<n) cin>>arr[x];
	
	if (n==1){
		cout<<2<<endl;
		return 0;
	}
	
	int af=(1<<n)-1;
	
	rep(x,0,1<<n){
		if (!cnt[arr[x]]){
			f[x]=true;
			cnt[af^arr[x]]=true;
		}
	}
	
	v.pub(0);
	
	int num=0;
	rep(x,1,(1<<n)+1){
		if (f[x-1]) num++;
		if (x%2==0 && x/2==num) v.pub(x/2);
	}
	
	ll odd=0,even=0;
	for (auto &it:v){
		if (it%2==0) even++;
		else odd++;
	}
	
	cout<<((1LL<<n)*((1LL<<n)+1)-odd*(odd-1)-even*(even-1))/2;
}

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