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Submission #867651

# Submission time Handle Problem Language Result Execution time Memory
867651 2023-10-29T04:25:40 Z sleepntsheep Beautiful row (IZhO12_beauty) C++17
100 / 100
 1075 ms 164764 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <deque>
#include <set>
#include <utility>
#include <array>

using namespace std;
#define ALL(x) x.begin(), x.end()
#define ShinLena cin.tie(nullptr)->sync_with_stdio(false);
using ll = long long;
#define N 20

int n, a[N], b3[N];
ll ans, dp[1<<N][N];

inline int beautiful(int i, int j) { return (__builtin_popcount(a[i]) == __builtin_popcount(a[j])) || b3[i] == b3[j]; }

int main()
{
    ShinLena;
    cin >> n;
    for (int i = 0; i < n; ++i)
    {
        cin >> a[i];
        for (int x = a[i]; x; b3[i] += (x % 3) == 1, x /= 3);
        dp[0][i] = 1;
    }
    for (int k = 0; k < (1 << n); ++k)
    {
        for (int j = 0; j < n; ++j)
        {
            if (!(k&(1<<j))) continue;
            for (int l = 0; l < n; ++l)
            {
                if (k & (1 << l))
                    dp[k][j] += beautiful(j, l) * dp[k&~(1<<j)][l];
            }
        }
    }

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

    return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 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 604 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 10 ms 4696 KB Output is correct
12 Correct 10 ms 4700 KB Output is correct
13 Correct 46 ms 10628 KB Output is correct
14 Correct 229 ms 41632 KB Output is correct
15 Correct 211 ms 41556 KB Output is correct
16 Correct 233 ms 41600 KB Output is correct
17 Correct 232 ms 41556 KB Output is correct
18 Correct 239 ms 41608 KB Output is correct
19 Correct 1075 ms 164732 KB Output is correct
20 Correct 1002 ms 164764 KB Output is correct