結果
問題 | No.1653 Squarefree |
ユーザー |
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提出日時 | 2021-08-20 22:52:50 |
言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,824 bytes |
コンパイル時間 | 3,275 ms |
コンパイル使用メモリ | 252,108 KB |
実行使用メモリ | 18,180 KB |
最終ジャッジ日時 | 2024-10-14 05:03:14 |
合計ジャッジ時間 | 15,920 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 35 WA * 3 |
ソースコード
#include <bits/stdc++.h>using i32 = std::int32_t;using u32 = std::uint32_t;using i64 = std::int64_t;using u64 = std::uint64_t;using i128 = __int128_t;using u128 = __uint128_t;using isize = std::ptrdiff_t;using usize = std::size_t;class rep {struct Iter {usize itr;constexpr Iter(const usize pos) noexcept : itr(pos) {}constexpr void operator++() noexcept { ++itr; }constexpr bool operator!=(const Iter& other) const noexcept { return itr != other.itr; }constexpr usize operator*() const noexcept { return itr; }};const Iter first, last;public:explicit constexpr rep(const usize first, const usize last) noexcept : first(first), last(std::max(first, last)) {}constexpr Iter begin() const noexcept { return first; }constexpr Iter end() const noexcept { return last; }};constexpr u64 ceil_log2(const u64 x) {u64 e = 0;while (((u64)1 << e) < x) ++e;return e;}template <class F> class AutoReallocation {using R = typename decltype(std::declval<F>()((usize)0))::value_type;F func;mutable std::vector<R> data;public:explicit AutoReallocation(F&& f) : func(std::forward<F>(f)), data() {}void reserve(const usize size) const {if (data.size() < size) data = func(((usize)1 << ceil_log2(size)));}R operator[](const usize i) const {reserve(i + 1);return data[i];}};template <class F> decltype(auto) auto_realloc(F&& f) {using G = std::decay_t<F>;return AutoReallocation<G>(std::forward<G>(f));}struct PrimeSieve {static inline const auto min_prime = auto_realloc([](const usize n) {std::vector<usize> ret(n);std::iota(ret.begin(), ret.end(), (usize)0);std::vector<usize> list;for (const usize i : rep(2, n)) {if (ret[i] == i) list.push_back(i);for (const usize p : list) {if (p * i >= n || p > ret[i]) break;ret[p * i] = p;}}return ret;});static bool is_prime(const usize n) {if (n <= 1) return false;return min_prime[n] == n;}template <class T> static std::vector<std::pair<T, usize>> factorize(T x) {assert(x > 0);std::vector<std::pair<T, usize>> ret;while (x != 1) {const usize p = min_prime[x];ret.emplace_back((T)p, 0);while (min_prime[x] == p) {ret.back().second++;x /= p;}}return ret;}};template <class T> using Vec = std::vector<T>;i64 isqrt(const i64 X) {if (X <= 1) {return X;}i64 ok = 0, ng = X;while (ng - ok > 1) {const i128 md = (ok + ng) / 2;(md * md > (i128)X ? ng : ok) = md;}return ok;}bool is_sq(const i64 x) {const i64 y = isqrt(x);return y != 1 and y * y == x;}void main_() {i64 L, R;std::cin >> L >> R;Vec<char> ok(R - L + 1, true);for (i64 k = 2; k <= 1000000; ++k) {if (!PrimeSieve::is_prime(k)) {continue;}const i64 x = k * k;for (i64 i = (L + x - 1) / x * x; i <= R; i += x) {ok[i - L] = false;}}for (i64 k = 1; k <= 1000000; ++k) {if (!PrimeSieve::is_prime(k)) {continue;}for (i64 i = (L + k - 1) / k * k; i <= R; i += k) {if (ok[i - L] and is_sq(i / k)) {ok[i - L] = false;}}}usize cnt = 0;for (const auto c : ok) {if (c) {cnt += 1;}}std::cout << cnt << '\n';}int main() {std::ios_base::sync_with_stdio(false);std::cin.tie(nullptr);main_();return 0;}