oj.uz

답안 #895030

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
895030 2023-12-29T10:56:35 Z raul2008487 아름다운 순열 (IZhO12_beauty) C++17
100 / 100
 752 ms 173136 KB 
#include <bits/stdc++.h>
#define ll long long
#define pll pair<ll,ll>
#define pb push_back
#define eb emplace_back
#define vl vector<ll>
#define fi first
#define se second
#define in insert
#define mpr make_pair
#define lg(x) __lg(x)
#define bpc(x) __builtin_popcount(x)
#define all(v) v.begin(), v.end()
#define endl "\n"
using namespace std;
const int mod = 998244353;
ll ans, n;
ll dp[(1<<21)][21];
bool ok[21][21];
void solve()
{
    ll i, j, mask;
    cin>>n;
    vl a(n);
    vector<pll> v(n);
    for(i=0;i<n;i++){
        cin>>a[i];
        v[i].fi = bpc(a[i]);
        ll lg = 20, cnt = 0, d = a[i];
        while(d){
            ll dv = pow(3, lg);
            lg--;
            if(dv > d){continue;}
            ll df = d / dv;
            cnt += (df == 1);
            d %= dv;
        }
        v[i].se = cnt;
    }
    for(i=0;i<n;i++){
        for(j=i;j<n;j++){
            if(v[i].fi == v[j].fi || v[i].se == v[j].se){
                ok[i][j] = ok[j][i] = 1;
            }
        }
    }
    for(i=0;i<n;i++){
        dp[0][i] = 1;
    }
    for(mask=1;mask<(1<<n);mask++){
        for(i=0;i<n;i++){
            if(mask & (1<<i)){
                for(j=0;j<n;j++){
                    if(mask & (1<<j) && ok[i][j]){
                        dp[mask][i] += dp[mask ^ (1<<i)][j];
                        if(mask+1 == (1<<n)){
                            ans += dp[mask ^ (1<<i)][j];
                        }
                    }
                }
            }
        }
    }
    cout << ans << endl;

}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //precomp();
    ll tst=1;
    //cin>>tst;
    while(tst--){
            solve();
    }
}
/*
ok.
*/

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 628 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 8 ms 4700 KB Output is correct
12 Correct 8 ms 4596 KB Output is correct
13 Correct 30 ms 12672 KB Output is correct
14 Correct 161 ms 43684 KB Output is correct
15 Correct 130 ms 43652 KB Output is correct
16 Correct 163 ms 43632 KB Output is correct
17 Correct 181 ms 43844 KB Output is correct
18 Correct 162 ms 43684 KB Output is correct
19 Correct 752 ms 173136 KB Output is correct
20 Correct 589 ms 172880 KB Output is correct