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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#781261 | #9561. 树数叔术 | hcywoi | 100 ✓ | 121ms | 17848kb | C++23 | 1.5kb | 2024-11-25 15:26:23 | 2024-11-25 15:26:26 |
Judging History
answer
#include <bits/stdc++.h>
using i64 = long long;
int P;
void inc(int &a, int b) {
a += b;
if (a >= P) {
a -= P;
}
}
void sub(int &a, int b) {
a -= b;
if (a < 0) {
a += P;
}
}
constexpr int N = 200;
int c[N + 5][N + 5];
int binom(int n, int m) {
if (n < m || m < 0) {
return 0;
}
return c[n][m];
}
void init() {
for (int i = 0; i <= N; i++) {
c[i][0] = 1;
for (int j = 1; j <= i; j++) {
inc(c[i][j], c[i - 1][j]);
inc(c[i][j], c[i - 1][j - 1]);
}
}
}
int main() {
// freopen("c.in", "r", stdin);
// freopen("c.out", "w", stdout);
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
int N, V;
std::cin >> N >> V >> P;
if (V >= N) {
std::cout << 0 << "\n";
return 0;
}
init();
std::vector<std::vector<std::vector<int>>> f(V + 1, std::vector<std::vector<int>>(N + 1, std::vector<int>(N + 1)));
f[0][1][0] = 1;
for (int i = 0; i < V; i++) {
for (int j = 1; j <= N; j++) {
for (int k = 0; k <= j; k++) {
if (f[i][j][k] != 0) {
for (int x = 0; x < k; x++) {
inc(f[i + 1][j][x], 1LL * f[i][j][k] * binom(k, x) % P);
}
for (int x = 1; x <= N - j; x++) {
inc(f[i + 1][j + x][k + x - 1], 1LL * f[i][j][k] * j % P);
}
}
}
}
}
int ans = f[V][N][0];
for (int i = 1; i <= N; i++) {
ans = 1LL * ans * i % P;
}
std::cout << ans << "\n";
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: 3808kb
input:
1 1 624295285
output:
0
result:
ok single line: '0'
Test #2:
score: 5
Accepted
time: 0ms
memory: 3616kb
input:
4 684813415 564954712
output:
0
result:
ok single line: '0'
Test #3:
score: 5
Accepted
time: 0ms
memory: 3712kb
input:
4 2 844826878
output:
24
result:
ok single line: '24'
Test #4:
score: 5
Accepted
time: 0ms
memory: 3548kb
input:
4 17724073 252218682
output:
0
result:
ok single line: '0'
Test #5:
score: 5
Accepted
time: 0ms
memory: 3656kb
input:
4 3 697681963
output:
384
result:
ok single line: '384'
Subtask #2:
score: 15
Accepted
Test #6:
score: 15
Accepted
time: 0ms
memory: 3712kb
input:
6 4 956647977
output:
238320
result:
ok single line: '238320'
Test #7:
score: 15
Accepted
time: 0ms
memory: 3552kb
input:
6 450615260 491361886
output:
0
result:
ok single line: '0'
Test #8:
score: 15
Accepted
time: 0ms
memory: 3772kb
input:
6 5 339344353
output:
933120
result:
ok single line: '933120'
Test #9:
score: 15
Accepted
time: 1ms
memory: 4016kb
input:
6 3 842228619
output:
23760
result:
ok single line: '23760'
Test #10:
score: 15
Accepted
time: 1ms
memory: 3660kb
input:
6 5 331699652
output:
933120
result:
ok single line: '933120'
Subtask #3:
score: 30
Accepted
Test #11:
score: 30
Accepted
time: 2ms
memory: 3924kb
input:
48 26 424594716
output:
362283012
result:
ok single line: '362283012'
Test #12:
score: 30
Accepted
time: 0ms
memory: 3564kb
input:
49 1000000000 738885247
output:
0
result:
ok single line: '0'
Test #13:
score: 30
Accepted
time: 2ms
memory: 4080kb
input:
48 39 688951620
output:
598399200
result:
ok single line: '598399200'
Test #14:
score: 30
Accepted
time: 0ms
memory: 3552kb
input:
50 476039414 292870080
output:
0
result:
ok single line: '0'
Test #15:
score: 30
Accepted
time: 2ms
memory: 4004kb
input:
50 48 245196368
output:
123576912
result:
ok single line: '123576912'
Subtask #4:
score: 50
Accepted
Test #16:
score: 50
Accepted
time: 0ms
memory: 3612kb
input:
150 526250070 197316869
output:
0
result:
ok single line: '0'
Test #17:
score: 50
Accepted
time: 116ms
memory: 14412kb
input:
149 116 671784452
output:
18945228
result:
ok single line: '18945228'
Test #18:
score: 50
Accepted
time: 108ms
memory: 16704kb
input:
146 144 906402626
output:
438777234
result:
ok single line: '438777234'
Test #19:
score: 50
Accepted
time: 115ms
memory: 16732kb
input:
147 143 705666477
output:
70408701
result:
ok single line: '70408701'
Test #20:
score: 50
Accepted
time: 121ms
memory: 17848kb
input:
150 147 453481175
output:
336290325
result:
ok single line: '336290325'