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답안 #41216

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
41216 2018-02-14T03:25:28 Z MatheusLealV 아름다운 순열 (IZhO12_beauty) C++14
0 / 100
 3000 ms 173164 KB 
#include <bits/stdc++.h>
#define N 21
#define M ((1<<20) + 100)
using namespace std;
typedef long long ll;

int n, v[N], qtd[N][5], lista[N];

ll dp[N][M], pot[45];

inline bool equal(int a, int b)
{
	return (qtd[a][2] == qtd[b][2] || qtd[a][3] == qtd[b][3]);
}

vector<int> grafo[N];

int ternary(int x)
{
	int cnt = 0;

	for(int log3 = 30; log3 >= 0; log3 --)
	{
		ll aux = pot[log3], qaux = 0;

		if(x >= aux)
		{
			x -= aux;

			qaux ++;
		}

		if(x >= aux)
		{
			x -= aux;

			qaux ++;
		}

		cnt = cnt + (qaux == 1);
	}

	return cnt;
}

ll solve(int x, int mask)
{
	if(dp[x][mask] != -1) return dp[x][mask];

	if(mask == (1<<n) - 1) return 1;

	dp[x][mask] = 0;

	for(int v = 0; v < n; v++)
	{
		if(mask & (1<<v)) continue;

		if(qtd[x][2] == qtd[v][2] || qtd[x][3] == qtd[v][3]) dp[x][mask] += solve(v, mask | (1<<v));
	}

	return dp[x][mask];
}

int main()
{
	ios::sync_with_stdio(false); cin.tie(0);

	cin>>n;

	for(int i = 0; i < n; i++) cin>>v[i];

	pot[0] = 1;

	for(int i = 1; i < 45; i++) pot[i] = pot[i - 1]*3;

	for(int i = 0; i < n; i++)
	{
		qtd[i][2] = __builtin_popcount (v[i]);

		qtd[i][3] = ternary(v[i]);
	}

	memset(dp, -1, sizeof dp);

	ll best = 0;

	for(int i = 0; i < n; i++) best += solve(i, 1<<i);

	cout<<best<<"\n";
}

Subtask #1
0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 138 ms 172920 KB Output is correct
2 Correct 124 ms 172920 KB Output is correct
3 Correct 119 ms 172920 KB Output is correct
4 Correct 120 ms 172920 KB Output is correct
5 Correct 124 ms 172920 KB Output is correct
6 Correct 123 ms 172932 KB Output is correct
7 Correct 123 ms 172932 KB Output is correct
8 Correct 121 ms 172932 KB Output is correct
9 Correct 121 ms 172932 KB Output is correct
10 Correct 123 ms 172932 KB Output is correct
11 Correct 132 ms 172932 KB Output is correct
12 Correct 132 ms 172932 KB Output is correct
13 Correct 186 ms 172932 KB Output is correct
14 Correct 509 ms 173128 KB Output is correct
15 Correct 588 ms 173128 KB Output is correct
16 Correct 449 ms 173128 KB Output is correct
17 Correct 582 ms 173164 KB Output is correct
18 Correct 393 ms 173164 KB Output is correct
19 Correct 2837 ms 173164 KB Output is correct
20 Execution timed out 3013 ms 173164 KB Time limit exceeded