QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#714113 | #9561. 树数叔术 | A_programmer | 100 ✓ | 388ms | 4600kb | C++17 | 1.3kb | 2024-11-05 21:44:50 | 2024-11-05 21:44:54 |
Judging History
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;
}
Details
Tip: Click on the bar to expand more detailed information
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'