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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#714113#9561. 树数叔术A_programmer100 ✓388ms4600kbC++171.3kb2024-11-05 21:44:502024-11-05 21:44:54

Judging History

你现在查看的是最新测评结果

  • [2024-11-05 21:44:54]
  • 评测
  • 测评结果:100
  • 用时:388ms
  • 内存:4600kb
  • [2024-11-05 21:44:50]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

ll mod, A[155][155], C[155][155];
ll f[2][155][155], g[155][155];

int main()
{
	ios::sync_with_stdio(false), cin.tie(0);
	
	int n, v;
	cin >> n >> v >> mod;
	for (int i = 0; i <= n; i++)
	{
		A[i][0] = C[i][0] = C[i][i] = 1;
		for (int j = 1; j <= i; j++) A[i][j] = A[i][j - 1] * (i - j + 1) % mod;
		for (int j = 1; j < i; j++) C[i][j] = (C[i - 1][j] + C[i - 1][j - 1]) % mod;
	}
	if (v + 1 > n) return cout << "0", 0;
	
	f[0][1][0] = 1; bool p = 0;
	for (int i = 1; i <= v; i++, p ^= 1)
	{
		memset(f[p ^ 1], 0, sizeof(f[p ^ 1]));
		memset(g, 0, sizeof(g));
		for (int j = i; j <= n; j++)
			for (int k = 0; k <= n - j; k++)
				for (int l = 0; l <= k; l++)
					(g[j + l][k - l] += f[p][j][k] * C[k][l] % mod * A[j + l][l] % mod) %= mod;
		for (int j = i; j <= n; j++)
			for (int k = 0; k <= n - j; k++)
			{
				for (int l = 0; l <= n - j - k; l++)
					(f[p ^ 1][j + l][k] += g[j][k] * C[j + l][l] % mod * A[j + k + l - 2][l] % mod) %= mod;
                if (j + k >= 2) (f[p ^ 1][j][k] += mod - f[p][j][k]) %= mod;
				(f[p ^ 1][j][k] += f[p][j - 1][k] * (j + k - 1) % mod * j) %= mod;
				if (k && j + k > 3) (f[p ^ 1][j][k] += f[p][j - 1][k - 1] * (j + k - 3) % mod * j) %= mod;
			}
	}
	cout << f[p][n][0];
	return 0;
}

详细

Subtask #1:

score: 5
Accepted

Test #1:

score: 5
Accepted
time: 0ms
memory: 3600kb

input:

1 1 624295285

output:

0

result:

ok single line: '0'

Test #2:

score: 5
Accepted
time: 0ms
memory: 3564kb

input:

4 684813415 564954712

output:

0

result:

ok single line: '0'

Test #3:

score: 5
Accepted
time: 1ms
memory: 4172kb

input:

4 2 844826878

output:

24

result:

ok single line: '24'

Test #4:

score: 5
Accepted
time: 0ms
memory: 3608kb

input:

4 17724073 252218682

output:

0

result:

ok single line: '0'

Test #5:

score: 5
Accepted
time: 1ms
memory: 4224kb

input:

4 3 697681963

output:

384

result:

ok single line: '384'

Subtask #2:

score: 15
Accepted

Test #6:

score: 15
Accepted
time: 1ms
memory: 4176kb

input:

6 4 956647977

output:

238320

result:

ok single line: '238320'

Test #7:

score: 15
Accepted
time: 0ms
memory: 3684kb

input:

6 450615260 491361886

output:

0

result:

ok single line: '0'

Test #8:

score: 15
Accepted
time: 1ms
memory: 4300kb

input:

6 5 339344353

output:

933120

result:

ok single line: '933120'

Test #9:

score: 15
Accepted
time: 1ms
memory: 4232kb

input:

6 3 842228619

output:

23760

result:

ok single line: '23760'

Test #10:

score: 15
Accepted
time: 1ms
memory: 4232kb

input:

6 5 331699652

output:

933120

result:

ok single line: '933120'

Subtask #3:

score: 30
Accepted

Test #11:

score: 30
Accepted
time: 5ms
memory: 4284kb

input:

48 26 424594716

output:

362283012

result:

ok single line: '362283012'

Test #12:

score: 30
Accepted
time: 0ms
memory: 3848kb

input:

49 1000000000 738885247

output:

0

result:

ok single line: '0'

Test #13:

score: 30
Accepted
time: 6ms
memory: 4284kb

input:

48 39 688951620

output:

598399200

result:

ok single line: '598399200'

Test #14:

score: 30
Accepted
time: 0ms
memory: 3760kb

input:

50 476039414 292870080

output:

0

result:

ok single line: '0'

Test #15:

score: 30
Accepted
time: 6ms
memory: 4336kb

input:

50 48 245196368

output:

123576912

result:

ok single line: '123576912'

Subtask #4:

score: 50
Accepted

Test #16:

score: 50
Accepted
time: 1ms
memory: 4100kb

input:

150 526250070 197316869

output:

0

result:

ok single line: '0'

Test #17:

score: 50
Accepted
time: 373ms
memory: 4524kb

input:

149 116 671784452

output:

18945228

result:

ok single line: '18945228'

Test #18:

score: 50
Accepted
time: 346ms
memory: 4576kb

input:

146 144 906402626

output:

438777234

result:

ok single line: '438777234'

Test #19:

score: 50
Accepted
time: 359ms
memory: 4600kb

input:

147 143 705666477

output:

70408701

result:

ok single line: '70408701'

Test #20:

score: 50
Accepted
time: 388ms
memory: 4528kb

input:

150 147 453481175

output:

336290325

result:

ok single line: '336290325'