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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#781261#9561. 树数叔术hcywoi100 ✓121ms17848kbC++231.5kb2024-11-25 15:26:232024-11-25 15:26:26

Judging History

你现在查看的是最新测评结果

  • [2024-11-25 15:26:26]
  • 评测
  • 测评结果:100
  • 用时:121ms
  • 内存:17848kb
  • [2024-11-25 15:26:23]
  • 提交

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'