#839595 (C++17) No.2214 Products on Tree

提出ソース

結果

問題	No.2214 Products on Tree
ユーザー	stoq
提出日時	2023-02-11 17:52:30
言語	C++17 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	200 ms / 3,000 ms
コード長	5,778 bytes
コンパイル時間	4,545 ms
コンパイル使用メモリ	270,464 KB
実行使用メモリ	48,896 KB
最終ジャッジ日時	2024-07-08 05:45:34
合計ジャッジ時間	10,264 ms
ジャッジサーバーID （参考情報）	judge4 / judge2

このコードへのチャレンジ
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テストケース

テストケース表示

入力	結果	実行時間実行使用メモリ
testcase_00	AC	14 ms 11,392 KB
testcase_01	AC	14 ms 11,520 KB
testcase_02	AC	14 ms 11,392 KB
testcase_03	AC	177 ms 17,536 KB
testcase_04	AC	180 ms 17,792 KB
testcase_05	AC	159 ms 17,408 KB
testcase_06	AC	104 ms 15,616 KB
testcase_07	AC	36 ms 12,672 KB
testcase_08	AC	28 ms 12,288 KB
testcase_09	AC	44 ms 13,056 KB
testcase_10	AC	103 ms 15,360 KB
testcase_11	AC	52 ms 13,568 KB
testcase_12	AC	67 ms 14,080 KB
testcase_13	AC	200 ms 17,792 KB
testcase_14	AC	191 ms 18,048 KB
testcase_15	AC	173 ms 17,792 KB
testcase_16	AC	180 ms 17,792 KB
testcase_17	AC	184 ms 17,792 KB
testcase_18	AC	86 ms 16,768 KB
testcase_19	AC	98 ms 17,280 KB
testcase_20	AC	82 ms 16,640 KB
testcase_21	AC	64 ms 15,488 KB
testcase_22	AC	120 ms 18,816 KB
testcase_23	AC	13 ms 11,392 KB
testcase_24	AC	14 ms 11,392 KB
testcase_25	AC	14 ms 11,520 KB
testcase_26	AC	13 ms 11,392 KB
testcase_27	AC	14 ms 11,392 KB
testcase_28	AC	102 ms 38,912 KB
testcase_29	AC	33 ms 13,312 KB
testcase_30	AC	89 ms 20,852 KB
testcase_31	AC	126 ms 20,852 KB
testcase_32	AC	116 ms 19,724 KB
testcase_33	AC	136 ms 48,896 KB
testcase_34	AC	136 ms 48,896 KB
testcase_35	AC	169 ms 33,280 KB
testcase_36	AC	166 ms 33,280 KB
testcase_37	AC	115 ms 17,792 KB

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ソースコード

raw source code

#define MOD_TYPE 2

#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
// #include <atcoder/lazysegtree>
// #include <atcoder/modint>
// #include <atcoder/segtree>
using namespace atcoder;
#if 0
#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
using Int = boost::multiprecision::cpp_int;
using lld = boost::multiprecision::cpp_dec_float_100;
#endif
#if 0
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tag_and_trait.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace __gnu_pbds;
using namespace __gnu_cxx;
template <typename T>
using extset =
    tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#endif
#if 1
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#endif
#pragma region Macros
using ll = long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;
template <typename Q_type>
using smaller_queue = priority_queue<Q_type, vector<Q_type>, greater<Q_type>>;
#if MOD_TYPE == 1
constexpr ll MOD = ll(1e9 + 7);
#else
#if MOD_TYPE == 2
constexpr ll MOD = 998244353;
#else
constexpr ll MOD = 1000003;
#endif
#endif
using mint = static_modint<MOD>;
constexpr int INF = (int)1e9 + 10;
constexpr ll LINF = (ll)4e18;
const double PI = acos(-1.0);
constexpr ld EPS = 1e-10;
constexpr int Dx[] = {0, 0, -1, 1, -1, 1, -1, 1, 0};
constexpr int Dy[] = {1, -1, 0, 0, -1, -1, 1, 1, 0};
#define REP(i, m, n) for (ll i = m; i < (ll)(n); ++i)
#define rep(i, n) REP(i, 0, n)
#define REPI(i, m, n) for (int i = m; i < (int)(n); ++i)
#define repi(i, n) REPI(i, 0, n)
#define YES(n) cout << ((n) ? "YES" : "NO") << "\n"
#define Yes(n) cout << ((n) ? "Yes" : "No") << "\n"
#define all(v) v.begin(), v.end()
#define NP(v) next_permutation(all(v))
#define dbg(x) cerr << #x << ":" << x << "\n";
#define UNIQUE(v) v.erase(unique(all(v)), v.end())
struct io_init {
  io_init() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << setprecision(30) << setiosflags(ios::fixed);
  };
} io_init;
template <typename T>
inline bool chmin(T &a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
template <typename T>
inline bool chmax(T &a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
inline ll floor(ll a, ll b) {
  if (b < 0) a *= -1, b *= -1;
  if (a >= 0) return a / b;
  return -((-a + b - 1) / b);
}
inline ll ceil(ll a, ll b) { return floor(a + b - 1, b); }
template <typename A, size_t N, typename T>
inline void Fill(A (&array)[N], const T &val) {
  fill((T *)array, (T *)(array + N), val);
}
template <typename T>
vector<T> compress(vector<T> &v) {
  vector<T> val = v;
  sort(all(val)), val.erase(unique(all(val)), val.end());
  for (auto &&vi : v) vi = lower_bound(all(val), vi) - val.begin();
  return val;
}
template <typename T, typename U>
constexpr istream &operator>>(istream &is, pair<T, U> &p) noexcept {
  is >> p.first >> p.second;
  return is;
}
template <typename T, typename U>
constexpr ostream &operator<<(ostream &os, pair<T, U> p) noexcept {
  os << p.first << " " << p.second;
  return os;
}
ostream &operator<<(ostream &os, mint m) {
  os << m.val();
  return os;
}
ostream &operator<<(ostream &os, modint m) {
  os << m.val();
  return os;
}
template <typename T>
constexpr istream &operator>>(istream &is, vector<T> &v) noexcept {
  for (int i = 0; i < v.size(); i++) is >> v[i];
  return is;
}
template <typename T>
constexpr ostream &operator<<(ostream &os, vector<T> &v) noexcept {
  for (int i = 0; i < v.size(); i++)
    os << v[i] << (i + 1 == v.size() ? "" : " ");
  return os;
}
template <typename T>
constexpr void operator--(vector<T> &v, int) noexcept {
  for (int i = 0; i < v.size(); i++) v[i]--;
}
random_device seed_gen;
mt19937_64 engine(seed_gen());
inline ll randInt(ll l, ll r) { return engine() % (r - l + 1) + l; }
struct BiCoef {
  vector<mint> fact_, inv_, finv_;
  BiCoef(int n) noexcept : fact_(n, 1), inv_(n, 1), finv_(n, 1) {
    fact_.assign(n, 1), inv_.assign(n, 1), finv_.assign(n, 1);
    for (int i = 2; i < n; i++) {
      fact_[i] = fact_[i - 1] * i;
      inv_[i] = -inv_[MOD % i] * (MOD / i);
      finv_[i] = finv_[i - 1] * inv_[i];
    }
  }
  mint C(ll n, ll k) const noexcept {
    if (n < k || n < 0 || k < 0) return 0;
    return fact_[n] * finv_[k] * finv_[n - k];
  }
  mint P(ll n, ll k) const noexcept { return C(n, k) * fact_[k]; }
  mint H(ll n, ll k) const noexcept { return C(n + k - 1, k); }
  mint Ch1(ll n, ll k) const noexcept {
    if (n < 0 || k < 0) return 0;
    mint res = 0;
    for (int i = 0; i < n; i++)
      res += C(n, i) * mint(n - i).pow(k) * (i & 1 ? -1 : 1);
    return res;
  }
  mint fact(ll n) const noexcept {
    if (n < 0) return 0;
    return fact_[n];
  }
  mint inv(ll n) const noexcept {
    if (n < 0) return 0;
    return inv_[n];
  }
  mint finv(ll n) const noexcept {
    if (n < 0) return 0;
    return finv_[n];
  }
};
BiCoef bc(300010);
#pragma endregion

// -------------------------------

int n;
vector<int> G[200020];
pair<mint, mint> f(int v, int p) {
  mint s = 1, t = 1;
  vector<mint> dp1, dp2;
  for (auto c : G[v]) {
    if (c == p) continue;
    auto [s2, t2] = f(c, v);
    dp1.push_back(s2);
    dp2.push_back(t2);
  }
  mint prod = 1;
  rep(i, dp1.size()) {
    s *= dp1[i] + dp2[i];
    t *= dp1[i] + dp2[i];
    prod *= dp1[i] + dp2[i];
  }
  mint u = 0;
  rep(i, dp1.size()) { u += dp2[i] * (prod / (dp1[i] + dp2[i])); }
  t += u;
  return {s, t};
}

void solve() {
  cin >> n;
  rep(i, n - 1) {
    int a, b;
    cin >> a >> b;
    a--, b--;
    G[a].push_back(b);
    G[b].push_back(a);
  }
  auto [dp1, dp2] = f(0, -1);
  cout << dp2 << "\n";
}

int main() { solve(); }

yukicoder

結果

テストケース

ソースコード