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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#763001 | #9561. 树数叔术 | hhoppitree | 100 ✓ | 122ms | 11304kb | C++17 | 1.1kb | 2024-11-19 17:40:56 | 2024-11-19 17:40:58 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int N = 155;
int fac[N], C[N][N], f[N][N][N];
signed main() {
int n, m, P; scanf("%d%d%d", &n, &m, &P);
if (m >= n) return 0 & puts("0");
for (int i = C[0][0] = fac[0] = 1; i <= n; ++i) {
fac[i] = 1ll * fac[i - 1] * i % P;
for (int j = C[i][0] = 1; j <= i; ++j) {
C[i][j] = (C[i - 1][j - 1] + C[i - 1][j]) % P;
}
}
f[0][1][0] = 1;
auto add = [&](int &x, long long y) {
x = (x + y) % P;
};
for (int i = 0; i < m; ++i) {
for (int j = 1; j <= n; ++j) {
for (int k = 0; k < j; ++k) {
if (!f[i][j][k]) continue;
for (int l = 1; l <= k; ++l) {
add(f[i + 1][j][k - l], 1ll * f[i][j][k] * C[k][l]);
}
for (int l = 0; l <= n - j - 1; ++l) {
add(f[i + 1][j + l + 1][k + l], 1ll * f[i][j][k] * j);
}
}
}
}
printf("%lld\n", 1ll * f[m][n][0] * fac[n] % P);
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: 3844kb
input:
1 1 624295285
output:
0
result:
ok single line: '0'
Test #2:
score: 5
Accepted
time: 0ms
memory: 3644kb
input:
4 684813415 564954712
output:
0
result:
ok single line: '0'
Test #3:
score: 5
Accepted
time: 0ms
memory: 3864kb
input:
4 2 844826878
output:
24
result:
ok single line: '24'
Test #4:
score: 5
Accepted
time: 0ms
memory: 3636kb
input:
4 17724073 252218682
output:
0
result:
ok single line: '0'
Test #5:
score: 5
Accepted
time: 0ms
memory: 3848kb
input:
4 3 697681963
output:
384
result:
ok single line: '384'
Subtask #2:
score: 15
Accepted
Test #6:
score: 15
Accepted
time: 0ms
memory: 3996kb
input:
6 4 956647977
output:
238320
result:
ok single line: '238320'
Test #7:
score: 15
Accepted
time: 0ms
memory: 3844kb
input:
6 450615260 491361886
output:
0
result:
ok single line: '0'
Test #8:
score: 15
Accepted
time: 0ms
memory: 3788kb
input:
6 5 339344353
output:
933120
result:
ok single line: '933120'
Test #9:
score: 15
Accepted
time: 0ms
memory: 3992kb
input:
6 3 842228619
output:
23760
result:
ok single line: '23760'
Test #10:
score: 15
Accepted
time: 0ms
memory: 4000kb
input:
6 5 331699652
output:
933120
result:
ok single line: '933120'
Subtask #3:
score: 30
Accepted
Test #11:
score: 30
Accepted
time: 2ms
memory: 4588kb
input:
48 26 424594716
output:
362283012
result:
ok single line: '362283012'
Test #12:
score: 30
Accepted
time: 0ms
memory: 3832kb
input:
49 1000000000 738885247
output:
0
result:
ok single line: '0'
Test #13:
score: 30
Accepted
time: 0ms
memory: 4792kb
input:
48 39 688951620
output:
598399200
result:
ok single line: '598399200'
Test #14:
score: 30
Accepted
time: 0ms
memory: 3792kb
input:
50 476039414 292870080
output:
0
result:
ok single line: '0'
Test #15:
score: 30
Accepted
time: 3ms
memory: 4912kb
input:
50 48 245196368
output:
123576912
result:
ok single line: '123576912'
Subtask #4:
score: 50
Accepted
Test #16:
score: 50
Accepted
time: 0ms
memory: 3792kb
input:
150 526250070 197316869
output:
0
result:
ok single line: '0'
Test #17:
score: 50
Accepted
time: 110ms
memory: 10800kb
input:
149 116 671784452
output:
18945228
result:
ok single line: '18945228'
Test #18:
score: 50
Accepted
time: 111ms
memory: 10948kb
input:
146 144 906402626
output:
438777234
result:
ok single line: '438777234'
Test #19:
score: 50
Accepted
time: 112ms
memory: 11016kb
input:
147 143 705666477
output:
70408701
result:
ok single line: '70408701'
Test #20:
score: 50
Accepted
time: 122ms
memory: 11304kb
input:
150 147 453481175
output:
336290325
result:
ok single line: '336290325'