Submission #883630

#	Time	Username	Problem	Language	Result	Execution time	Memory
883630		NintsiChkhaidze	Beautiful row (IZhO12_beauty)	C++17	100 / 100	631 ms	189216 KiB

beauty

#include <bits/stdc++.h>
#define pb push_back
#define s second
#define f first
#define left (h<<1),l,(l + r)/2
#define right ((h<<1)|1),(l + r)/2 + 1,r
#define pii pair<int,int>
#define ll long long
using namespace std;

const int N = 1e5 + 3;

ll dp[(1<<20) + 3][23];
int p2[23],p3[23],a[23];

signed main (){
    ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);
	
	int n;
	cin>>n;

	for (int i = 0; i < n; i++)
		cin >> a[i],dp[(1<<i)][i] = 1;

	for (int i = 0; i < n; i++){
		p2[i] = __builtin_popcount(a[i]);
		while (a[i] > 0){
			p3[i] += (a[i] % 3 == 1);
			a[i] /= 3;
		}
	}

	for (int mask = 0; mask < (1<<n); mask++){
		vector <int> on,off;
		for (int i=0;i<n;i++){
			if (!(mask & (1<<i))) off.pb(i);
			else on.pb(i);
		}

		for (int x: on){
			for (int y: off){
				if (p2[x] == p2[y] || p3[x] == p3[y]) 
					dp[(mask ^ (1<<y))][y] += dp[mask][x];
			}
		}
	}

	ll ans = 0;
	for (int i = 0; i < n; i++)
		ans += dp[(1<<n) - 1][i];
	cout<<ans;
}

• Subtask 1: 100 / 100