제출 #382222

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
382222		vishesh312	아름다운 순열 (IZhO12_beauty)	C++17	0 / 100	55 ms	4716 KiB

beauty

#include "bits/stdc++.h"
using namespace std;
/*
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using ordered_set = tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>;
*/

#define all(x) begin(x), end(x)
#define sz(x) (int)x.size()

using ll = long long;
const int mod = 1e9+7;

void solve(int tc) {
    int n;
    cin >> n;
    vector<int> v(n);
    for (auto &x : v) cin >> x;
    vector<vector<int>> dp(n, vector<int>(1<<n));
    for (int i = 0; i < n; ++i) {
        dp[i][1<<i] = 1;
    }
    vector<int> a(n);
    for (int i = 0; i < n; ++i) {
        int x = v[i];
        while (x) {
            a[i] += (x % 3 == 1);
            x /= 3;
        }
    }
    for (int mask = 0; mask < (1<<n); ++mask) {
        for (int i = 0; i < n; ++i) {
            if (mask&(1<<i)) {
                for (int j = 0; j < n; ++j) {
                    if (!(mask&(1<<j)) and (__builtin_popcount(v[i]) == __builtin_popcount(v[j]) or a[i] == a[j])) {
                        dp[j][mask|(1<<j)] += dp[i][mask];
                    }
                }
            }
        }
    }
    ll ans = 0;
    for (int i = 0; i < n; ++i) {
        ans += dp[i][(1<<n)-1];
    }
    cout << ans << '\n';
}

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    int tc = 1;
    //cin >> tc;
    for (int i = 1; i <= tc; ++i) solve(i);
    return 0;
}

• Subtask 1: 0 / 100