oj.uz

답안 #147561

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
147561 2019-08-30T04:48:36 Z Gandook Skyscraper (JOI16_skyscraper) C++17
100 / 100
 210 ms 39160 KB 
#include <bits/stdc++.h>

#define SZ(x) (((int)x.size()))

typedef long long ll;

using namespace std;

const int mod = 1000000007, maxn = 110, maxm = 55, maxl = 1*1000+10;
int dp[maxn][maxm][maxl][3], n, l, a[maxn], cost;

int main()
{
	cin >> n >> l;
	for (int i = 0; i < n; i++)
		cin >> a[i];
	if (n == 1)
	{
		cout << 1;
		return 0;
	}
	sort(a, a + n);
	for (int i = 0; i <= l; i++)
		dp[0][0][i][0] = 1;
	for (int i = 1; i <= n; i++)
	{
		for (int j = 1; j <= min(i, (n + 1) / 2); j++)
		{
			for (int k = 0; k <= l; k++)
			{
				for (int m = 0; m < 3; m++)
				{
					cost = (j * 2 - m) * (a[i] - a[i - 1]);
					if (cost > k)
						continue;
					if (m > 0)
					{
						dp[i][j][k][m] += (dp[i - 1][j][k - cost][m - 1] * (3 - m)) % mod;
						dp[i][j][k][m] %= mod;
						if (i + j + 1 - m <= n)
						{
							dp[i][j][k][m] += (dp[i - 1][j - 1][k - cost][m - 1] * (3 - m)) % mod;
							dp[i][j][k][m] %= mod;
						}
					}
					if (i + j + 1 - m <= n)
					{
						dp[i][j][k][m] += ((ll)dp[i - 1][j - 1][k - cost][m] * (j - m)) % mod;
						dp[i][j][k][m] %= mod;
						dp[i][j][k][m] += ((ll)dp[i - 1][j][k - cost][m] * (j * 2 - m)) % mod;
						dp[i][j][k][m] %= mod;
					}
					if (j < (n + 1) / 2)
					{
						dp[i][j][k][m] += ((ll)dp[i - 1][j + 1][k - cost][m] * j) % mod;
						dp[i][j][k][m] %= mod;
					}
					//cerr << i << " " << j << " " << k << " " << m << " " << dp[i][j][k][m] << endl;
				}
			}
		}
	}
	cout << dp[n][1][l][2];
	return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 400 KB Output is correct
5 Correct 4 ms 760 KB Output is correct
6 Correct 4 ms 632 KB Output is correct
7 Correct 3 ms 532 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 3 ms 632 KB Output is correct
10 Correct 2 ms 504 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 632 KB Output is correct
2 Correct 3 ms 632 KB Output is correct
3 Correct 3 ms 632 KB Output is correct
4 Correct 3 ms 632 KB Output is correct
5 Correct 3 ms 632 KB Output is correct
6 Correct 3 ms 632 KB Output is correct
7 Correct 3 ms 632 KB Output is correct
8 Correct 3 ms 632 KB Output is correct
9 Correct 3 ms 760 KB Output is correct
10 Correct 3 ms 632 KB Output is correct

Subtask #3
80.0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 400 KB Output is correct
5 Correct 4 ms 760 KB Output is correct
6 Correct 4 ms 632 KB Output is correct
7 Correct 3 ms 532 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 3 ms 632 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 3 ms 632 KB Output is correct
12 Correct 3 ms 632 KB Output is correct
13 Correct 3 ms 632 KB Output is correct
14 Correct 3 ms 632 KB Output is correct
15 Correct 3 ms 632 KB Output is correct
16 Correct 3 ms 632 KB Output is correct
17 Correct 3 ms 632 KB Output is correct
18 Correct 3 ms 632 KB Output is correct
19 Correct 3 ms 760 KB Output is correct
20 Correct 3 ms 632 KB Output is correct
21 Correct 6 ms 2936 KB Output is correct
22 Correct 145 ms 27840 KB Output is correct
23 Correct 199 ms 36672 KB Output is correct
24 Correct 185 ms 39160 KB Output is correct
25 Correct 210 ms 37508 KB Output is correct
26 Correct 183 ms 36564 KB Output is correct
27 Correct 81 ms 24448 KB Output is correct
28 Correct 94 ms 27000 KB Output is correct
29 Correct 162 ms 37296 KB Output is correct
30 Correct 210 ms 37668 KB Output is correct