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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
#746476#9740. Aho-Corasick 自动机wsyear#AC ✓55ms8972kbC++202.9kb2024-11-14 14:46:202024-11-14 14:46:21

Judging History

你现在查看的是最新测评结果

  • [2024-11-14 14:46:21]
  • 评测
  • 测评结果:AC
  • 用时:55ms
  • 内存:8972kb
  • [2024-11-14 14:46:20]
  • 提交

answer

#include <bits/stdc++.h>

#define rep(i, j, k) for (int i = (j); i <= (k); ++i)
#define per(i, j, k) for (int i = (j); i >= (k); --i)
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second
using ll = long long;
using pii = std::pair<int, int>;
using pll = std::pair<ll, ll>;

template<class T>inline void chkmn(T &x, T y) { if (y < x) x = y; }
template<class T>inline void chkmx(T &x, T y) { if (y > x) x = y; }

using namespace std;

template <int P>
class mod_int {
  using Z = mod_int;

private:
  static int mo(int x) { return x < 0 ? x + P : x; }

public:
  int x;
  int val() const { return x; }
  mod_int() : x(0) {}
  template <class T>
  mod_int(const T &x_) : x(x_ >= 0 && x_ < P ? static_cast<int>(x_) : mo(static_cast<int>(x_ % P))) {}
  bool operator==(const Z &rhs) const { return x == rhs.x; }
  bool operator!=(const Z &rhs) const { return x != rhs.x; }
  Z operator-() const { return Z(x ? P - x : 0); }
  Z pow(long long k) const {
    Z res = 1, t = *this;
    while (k) {
      if (k & 1) res *= t;
      if (k >>= 1) t *= t;
    }
    return res;
  }
  Z &operator++() {
    x < P - 1 ? ++x : x = 0;
    return *this;
  }
  Z &operator--() {
    x ? --x : x = P - 1;
    return *this;
  }
  Z operator++(int) {
    Z ret = x;
    x < P - 1 ? ++x : x = 0;
    return ret;
  }
  Z operator--(int) {
    Z ret = x;
    x ? --x : x = P - 1;
    return ret;
  }
  Z inv() const { return pow(P - 2); }
  Z &operator+=(const Z &rhs) {
    (x += rhs.x) >= P && (x -= P);
    return *this;
  }
  Z &operator-=(const Z &rhs) {
    (x -= rhs.x) < 0 && (x += P);
    return *this;
  }
  Z &operator*=(const Z &rhs) {
    x = 1ULL * x * rhs.x % P;
    return *this;
  }
  Z &operator/=(const Z &rhs) { return *this *= rhs.inv(); }
#define setO(T, o)                                 \
  friend T operator o(const Z &lhs, const Z &rhs) {\
    Z res = lhs;                                   \
    return res o## = rhs;                          \
  }
  setO(Z, +) setO(Z, -) setO(Z, *) setO(Z, /)
#undef setO
};
const int P = 998244353;
using Z = mod_int<P>;

const int maxn = 110;
const int maxm = 10010;

int n, m, d;
Z fac[maxm], ivf[maxm], f[maxn][maxn][maxn];

Z binom(int x, int y) {
  if (x < 0 || y < 0 || x < y) return 0;
  return fac[x] * ivf[y] * ivf[x - y];
}

int main() {
  fac[0] = 1;
  rep (i, 1, maxm - 1) fac[i] = fac[i - 1] * i;
  ivf[maxm - 1] = fac[maxm - 1].inv();
  per (i, maxm - 1, 1) ivf[i - 1] = ivf[i] * i;
  cin.tie(nullptr) -> ios::sync_with_stdio(false);
  cin >> n >> m >> d;
  f[0][1][1] = 1;
  rep (i, 1, d) {
    rep (j, 0, n) rep (k, 0, j) {
      rep (p, 0, n - j) {
        f[i][j + p][p] += f[i - 1][j][k] * binom(k * m, p);
      }
    }
  }
  Z ans = 0;
  rep (i, 0, n) ans += f[d][n][i];
  cout << ans.val() << '\n';
}

这程序好像有点Bug,我给组数据试试?

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 8888kb

input:

3 2 2

output:

5

result:

ok answer is '5'

Test #2:

score: 0
Accepted
time: 1ms
memory: 8856kb

input:

4 2 2

output:

6

result:

ok answer is '6'

Test #3:

score: 0
Accepted
time: 0ms
memory: 8880kb

input:

1 1 1

output:

1

result:

ok answer is '1'

Test #4:

score: 0
Accepted
time: 2ms
memory: 8912kb

input:

30 30 30

output:

286511539

result:

ok answer is '286511539'

Test #5:

score: 0
Accepted
time: 0ms
memory: 8852kb

input:

13 13 13

output:

818093168

result:

ok answer is '818093168'

Test #6:

score: 0
Accepted
time: 2ms
memory: 8896kb

input:

30 25 25

output:

730504816

result:

ok answer is '730504816'

Test #7:

score: 0
Accepted
time: 2ms
memory: 8824kb

input:

29 29 29

output:

892409454

result:

ok answer is '892409454'

Test #8:

score: 0
Accepted
time: 2ms
memory: 8896kb

input:

15 30 28

output:

505511076

result:

ok answer is '505511076'

Test #9:

score: 0
Accepted
time: 1ms
memory: 8912kb

input:

20 10 30

output:

250115604

result:

ok answer is '250115604'

Test #10:

score: 0
Accepted
time: 0ms
memory: 8848kb

input:

20 30 30

output:

623437187

result:

ok answer is '623437187'

Test #11:

score: 0
Accepted
time: 55ms
memory: 8972kb

input:

100 100 100

output:

933606371

result:

ok answer is '933606371'

Test #12:

score: 0
Accepted
time: 53ms
memory: 8920kb

input:

100 95 95

output:

368609759

result:

ok answer is '368609759'

Test #13:

score: 0
Accepted
time: 48ms
memory: 8824kb

input:

95 100 100

output:

691641619

result:

ok answer is '691641619'

Test #14:

score: 0
Accepted
time: 46ms
memory: 8900kb

input:

95 97 98

output:

517539873

result:

ok answer is '517539873'

Test #15:

score: 0
Accepted
time: 12ms
memory: 8824kb

input:

94 67 23

output:

601572539

result:

ok answer is '601572539'

Extra Test:

score: 0
Extra Test Passed