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QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#707802 | #9561. 树数叔术 | JWRuixi | 100 ✓ | 237ms | 3920kb | C++20 | 1.7kb | 2024-11-03 17:35:26 | 2024-11-03 17:35:28 |
Judging History
answer
#ifdef LOCAL
#include "stdafx.h"
#else
#include <bits/stdc++.h>
#define IL inline
#define LL long long
#define eb emplace_back
#define sz(v) ((int) (v).size())
#define me(f, x) memset(f, x, sizeof(f))
#define mc(f, g) memcpy(f, g, sizeof(f))
#define L(i, j, k) for (int i = (j); i <= (k); ++i)
#define R(i, j, k) for (int i = (j); i >= (k); --i)
#define FIO(FILE) freopen(FILE".in", "r", stdin), freopen(FILE".out", "w", stdout)
using namespace std;
using vi = vector<int>;
#endif
constexpr int N = 155;
int n, m, P;
IL constexpr int qpow (int b, int k = P - 2) {
int r = 1;
for (; k; k >>= 1, b = (LL)b * b % P) if (k & 1) r = (LL)r * b % P;
return r;
}
int fc[N], ifc[N], C[N][N];
void init (int Z) {
fc[0] = 1;
L (i, 1, Z) {
fc[i] = (LL)fc[i - 1] * i % P;
}
ifc[Z] = qpow(fc[Z]);
R (i, Z - 1, 0) {
ifc[i] = (LL)ifc[i + 1] * (i + 1) % P;
}
L (i, 0, Z) {
C[i][0] = 1;
L (j, 1, i) {
C[i][j] = (C[i - 1][j] + C[i - 1][j - 1]) % P;
}
}
}
int dp[N][N], _dp[N][N];
void pls (int &x, const LL &y) {
x = (x + y) % P;
}
int main () {
ios::sync_with_stdio(0), cin.tie(0);
cin >> n >> m >> P;
if (m >= n) {
cout << "0\n";
return 0;
}
init(n);
dp[1][0] = n;
L (c, 1, m) {
me(_dp, 0);
L (i, 1, n - 1) {
L (j, 0, n - i) {
int x = dp[i][j];
if (x) {
L (k, 1, n - i - j) {
pls(_dp[i + 1][j + k - 1], (LL)x * (n - i) % P * (i + j));
}
L (k, 1, j) {
pls(_dp[i + k][j - k], (LL)x * C[n - i][k] % P * C[j][k] % P * fc[k]);
}
}
}
}
mc(dp, _dp);
}
cout << dp[n][0] << '\n';
}
// I love WHQ!
詳細信息
Subtask #1:
score: 5
Accepted
Test #1:
score: 5
Accepted
time: 0ms
memory: 3712kb
input:
1 1 624295285
output:
0
result:
ok single line: '0'
Test #2:
score: 5
Accepted
time: 0ms
memory: 3560kb
input:
4 684813415 564954712
output:
0
result:
ok single line: '0'
Test #3:
score: 5
Accepted
time: 0ms
memory: 3812kb
input:
4 2 844826878
output:
24
result:
ok single line: '24'
Test #4:
score: 5
Accepted
time: 0ms
memory: 3708kb
input:
4 17724073 252218682
output:
0
result:
ok single line: '0'
Test #5:
score: 5
Accepted
time: 0ms
memory: 3892kb
input:
4 3 697681963
output:
384
result:
ok single line: '384'
Subtask #2:
score: 15
Accepted
Test #6:
score: 15
Accepted
time: 0ms
memory: 3832kb
input:
6 4 956647977
output:
238320
result:
ok single line: '238320'
Test #7:
score: 15
Accepted
time: 0ms
memory: 3712kb
input:
6 450615260 491361886
output:
0
result:
ok single line: '0'
Test #8:
score: 15
Accepted
time: 0ms
memory: 3800kb
input:
6 5 339344353
output:
933120
result:
ok single line: '933120'
Test #9:
score: 15
Accepted
time: 0ms
memory: 3824kb
input:
6 3 842228619
output:
23760
result:
ok single line: '23760'
Test #10:
score: 15
Accepted
time: 0ms
memory: 3896kb
input:
6 5 331699652
output:
933120
result:
ok single line: '933120'
Subtask #3:
score: 30
Accepted
Test #11:
score: 30
Accepted
time: 3ms
memory: 3920kb
input:
48 26 424594716
output:
362283012
result:
ok single line: '362283012'
Test #12:
score: 30
Accepted
time: 0ms
memory: 3632kb
input:
49 1000000000 738885247
output:
0
result:
ok single line: '0'
Test #13:
score: 30
Accepted
time: 3ms
memory: 3920kb
input:
48 39 688951620
output:
598399200
result:
ok single line: '598399200'
Test #14:
score: 30
Accepted
time: 0ms
memory: 3644kb
input:
50 476039414 292870080
output:
0
result:
ok single line: '0'
Test #15:
score: 30
Accepted
time: 3ms
memory: 3792kb
input:
50 48 245196368
output:
123576912
result:
ok single line: '123576912'
Subtask #4:
score: 50
Accepted
Test #16:
score: 50
Accepted
time: 0ms
memory: 3616kb
input:
150 526250070 197316869
output:
0
result:
ok single line: '0'
Test #17:
score: 50
Accepted
time: 229ms
memory: 3888kb
input:
149 116 671784452
output:
18945228
result:
ok single line: '18945228'
Test #18:
score: 50
Accepted
time: 212ms
memory: 3916kb
input:
146 144 906402626
output:
438777234
result:
ok single line: '438777234'
Test #19:
score: 50
Accepted
time: 218ms
memory: 3888kb
input:
147 143 705666477
output:
70408701
result:
ok single line: '70408701'
Test #20:
score: 50
Accepted
time: 237ms
memory: 3908kb
input:
150 147 453481175
output:
336290325
result:
ok single line: '336290325'