oj.uz

Submission #1039359

# Submission time Handle Problem Language Result Execution time Memory
1039359 2024-07-30T18:58:16 Z iliaaaaa Skyscraper (JOI16_skyscraper) C++14
100 / 100
 89 ms 51024 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
#define F first
#define S second
#define All(x) (x).begin(),(x).end()
#define len(x) (int)(x).size()
#define pb push_back
#define int long long

const int N = 100 + 7, M = 1000 + 7, P = 1e9 + 7;
int n, l, a[N], dp[N][N][M][3];

int32_t main() {
	ios:: sync_with_stdio(0), cin.tie(0), cout.tie(0);
	cin >> n >> l;
	for (int i = 1; i <= n; i++)
		cin >> a[i];
	sort(a + 1, a + n + 1);
	a[n + 1] = 1e4;
	if (n == 1) {
		cout << 1 << '\n';
		return 0;
	}
	dp[0][0][0][0] = 1;
	for (int i = 1; i <= n; i++)
		for (int j = 1; j <= i; j++)
			for (int k = 0; k <= l; k++)
				for (int m = 0; m <= 2; m++) {
					int t = 2 * j * (a[i + 1] - a[i]) - m * (a[i + 1] - a[i]);
					if (t > k || i + j + 1 - m > n)
						continue;
					// j - 1 => j
					dp[i][j][k][m] = (dp[i][j][k][m] + dp[i - 1][j - 1][k - t][m]) % P;
					if (m)
						dp[i][j][k][m] = (dp[i][j][k][m] + (2 - (m - 1)) * dp[i - 1][j - 1][k - t][m - 1]) % P;
					// j => j adi
					dp[i][j][k][m] = (dp[i][j][k][m] + 1LL * (2 * (j - m) + m) * dp[i - 1][j][k - t][m] % P) % P;
					// j => j gooshe
					if (m == 1)
						dp[i][j][k][m] = (dp[i][j][k][m] + 2 * j * dp[i - 1][j][k - t][0] % P) % P;
					else if (m == 2) {
						if (i == n) {
							if (j == 1)
								dp[i][j][k][m] = (dp[i][j][k][m] + dp[i - 1][j][k - t][m - 1]) % P;
						}
						else
							dp[i][j][k][m] = (dp[i][j][k][m] + (j - 1) * dp[i - 1][j][k - t][m - 1] % P) % P;
					}
					// j + 1 => j
					if (m == 2) {
						if (i == n) {
							if (j == 1)
								dp[i][j][k][m] = (dp[i][j][k][m] + dp[i - 1][j + 1][k - t][m]) % P;
						}
						else
							dp[i][j][k][m] = (dp[i][j][k][m] + 1LL * j * (j - 1) % P * dp[i - 1][j + 1][k - t][m] % P) % P;
					}
					else if (m == 1)
						dp[i][j][k][m] = (dp[i][j][k][m] + 1LL * j * j % P * dp[i - 1][j + 1][k - t][m] % P) % P;
					else
						dp[i][j][k][m] = (dp[i][j][k][m] + 1LL * j * (j + 1) % P * dp[i - 1][j + 1][k - t][m] % P) % P;
				}
	int ans = 0;
	for (int i = 0; i <= l; i++)
		ans = (ans + dp[n][1][i][2]) % P;
	cout << ans << '\n';
	return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 464 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 604 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 616 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 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 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 464 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 600 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 616 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 604 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 604 KB Output is correct
21 Correct 2 ms 2396 KB Output is correct
22 Correct 62 ms 35972 KB Output is correct
23 Correct 82 ms 47700 KB Output is correct
24 Correct 74 ms 46932 KB Output is correct
25 Correct 89 ms 50768 KB Output is correct
26 Correct 76 ms 46164 KB Output is correct
27 Correct 29 ms 23712 KB Output is correct
28 Correct 35 ms 26964 KB Output is correct
29 Correct 66 ms 41212 KB Output is correct
30 Correct 86 ms 51024 KB Output is correct