結果
問題 |
No.1532 Different Products
|
ユーザー |
![]() |
提出日時 | 2021-06-05 14:23:34 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,965 bytes |
コンパイル時間 | 2,482 ms |
コンパイル使用メモリ | 206,948 KB |
最終ジャッジ日時 | 2025-01-22 03:40:43 |
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 18 WA * 44 |
ソースコード
//#pragma GCC optimize("Ofast") //#pragma GCC optimize("unroll-loops") #include <bits/stdc++.h> #include <atcoder/modint> using namespace std; using namespace atcoder; using ll = long long; using ull = unsigned long long; using pii = pair<int, int>; template <class T> using V = vector<T>; template <class T> using VV = V<V<T>>; template <class T> V<T> make_vec(size_t a) { return V<T>(a); } template <class T, class... Ts> auto make_vec(size_t a, Ts... ts) { return V<decltype(make_vec<T>(ts...))>(a, make_vec<T>(ts...)); } #define pb push_back #define eb emplace_back #define mp make_pair #define fi first #define se second #define rep(i, n) rep2(i, 0, n) #define rep2(i, m, n) for (int i = m; i < (n); i++) #define per(i, b) per2(i, 0, b) #define per2(i, a, b) for (int i = int(b) - 1; i >= int(a); i--) #define ALL(c) (c).begin(), (c).end() #define SZ(x) ((int)(x).size()) constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); } template <class T, class U> void chmin(T& t, const U& u) { if (t > u) t = u; } template <class T, class U> void chmax(T& t, const U& u) { if (t < u) t = u; } template <class T, class U> ostream& operator<<(ostream& os, const pair<T, U>& p) { os << "(" << p.first << "," << p.second << ")"; return os; } template <class T> ostream& operator<<(ostream& os, const vector<T>& v) { os << "{"; rep(i, v.size()) { if (i) os << ","; os << v[i]; } os << "}"; return os; } template <class T> auto operator<<(ostream& os, T t) -> typename std::enable_if_t<internal::is_modint<T>::value, ostream&> { os << t.val(); return os; } #ifdef LOCAL void debug_out() { cerr << endl; } template <typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << " " << H; debug_out(T...); } #define debug(...) \ cerr << __LINE__ << " [" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__) #define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl #else #define debug(...) (void(0)) #define dump(x) (void(0)) #endif unordered_map<ll, ull> T[210]; V<pair<ll, ll>> enum_quotient(ll N) { V<pair<ll, ll>> res; ll l = 1; while (l <= N) { ll r = N / (N / l) + 1; //[l, r) res.emplace_back(l, r); l = r; } return res; } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int N; ll K; cin >> N >> K; auto v = enum_quotient(K); V<ll> up; for (auto x : v) up.pb(K / x.fi); reverse(ALL(up)); auto dp = make_vec<ull>(N + 2, SZ(up)); rep(i, SZ(up)) dp[N + 1][i] = 1; for (int i = N; i >= 1; --i) { int pt = 0; rep(j, SZ(up)) { dp[i][j] += dp[i + 1][j]; int nx = up[j] / i; if (nx > 0) { while (pt < SZ(up) && up[pt] < nx) pt++; dp[i][j] += dp[i + 1][pt]; } } } cout << dp[1][SZ(up) - 1] - 1 << endl; return 0; }