Submission #338670

#	Time	Username	Problem	Language	Result	Execution time	Memory
338670		amunduzbaev	Beautiful row (IZhO12_beauty)	C++14	100 / 100	844 ms	189248 KiB

beauty

/** made by amunduzbaev **/
#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define ll long long 
#define ld long double 
#define pii pair<int, int>
#define pll pair<ll, ll>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define fastios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vll vector<ll>
#define vii vector<int>
#define vpii vector<pii>
#define vpll vector<pll>
template<class T> bool umin(T& a, const T& b) {return a > b? a = b, true:false;}
template<class T> bool umax(T& a, const T& b) {return a < b? a = b, true:false;}

const int N = 23;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);

int n, m, k, ans, a[N];
bool path[N][N];
ll dp[1<<N][N];

int cnt(int x){ 
	int cnt = 0; 
	while(x) cnt += (x%2 == 1), x/=2; 
	return cnt;
}
int cnt1(int x){
	int cnt = 0; 
	while(x) cnt += (x%3 == 1), x/=3; 
	return cnt;
}

void solve(){
	fastios 
	cin>>n;
	for(int i=0; i<n; i++) cin>>a[i];
	for(int i=0; i<n; i++)
		for(int j=0;j<n;j++) { if(i == j) continue; 
			if(cnt(a[i]) == cnt(a[j]) || cnt1(a[i]) == cnt1(a[j])) path[i][j] = 1; }
	
	for(int i=0; i<(n); i++) dp[1<<i][i] = 1;
	for(int i=1; i<(1<<n); i++){
		for(int j=0; j<n; j++){
			if(i & (1<<j)){
				for(int t=0; t<n; t++)
					if(j != t && path[j][t] && (i&(1<<t))) dp[i][j] += dp[i ^ (1<<j)][t];
			}
		}
	}
	ll ans = 0;	
	for(int i=0;i<n;i++) ans += dp[(1<<n)-1][i];
	cout<<ans<<"\n";
	return;
}
 
 
int main(){
	fastios
	int t = 1;
	if(t) solve();
	else {
		cin>>t;
		while (t--) solve();
	}
	return 0;
}

• Subtask 1: 100 / 100