結果
問題 | No.1664 Unstable f(n) |
ユーザー | keijak |
提出日時 | 2021-09-04 05:14:11 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 3 ms / 2,000 ms |
コード長 | 4,453 bytes |
コンパイル時間 | 7,688 ms |
コンパイル使用メモリ | 372,824 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-05-09 16:07:58 |
合計ジャッジ時間 | 9,412 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
(要ログイン)
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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 3 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 2 ms
5,376 KB |
testcase_16 | AC | 3 ms
5,376 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
testcase_23 | AC | 2 ms
5,376 KB |
testcase_24 | AC | 2 ms
5,376 KB |
testcase_25 | AC | 3 ms
5,376 KB |
testcase_26 | AC | 2 ms
5,376 KB |
testcase_27 | AC | 2 ms
5,376 KB |
testcase_28 | AC | 2 ms
5,376 KB |
testcase_29 | AC | 3 ms
5,376 KB |
testcase_30 | AC | 2 ms
5,376 KB |
testcase_31 | AC | 2 ms
5,376 KB |
testcase_32 | AC | 2 ms
5,376 KB |
testcase_33 | AC | 2 ms
5,376 KB |
testcase_34 | AC | 2 ms
5,376 KB |
testcase_35 | AC | 2 ms
5,376 KB |
testcase_36 | AC | 2 ms
5,376 KB |
testcase_37 | AC | 2 ms
5,376 KB |
testcase_38 | AC | 2 ms
5,376 KB |
testcase_39 | AC | 2 ms
5,376 KB |
testcase_40 | AC | 2 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> #define REP_(i, a_, b_, a, b, ...) \ for (int i = (a), END_##i = (b); i < END_##i; ++i) #define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__) #define ALL(x) std::begin(x), std::end(x) using i64 = long long; template<typename T, typename U> inline bool chmax(T &a, U b) { return a < b and ((a = std::move(b)), true); } template<typename T, typename U> inline bool chmin(T &a, U b) { return a > b and ((a = std::move(b)), true); } template<typename T> inline int ssize(const T &a) { return (int) std::size(a); } template<typename T> std::istream &operator>>(std::istream &is, std::vector<T> &a) { for (auto &x: a) is >> x; return is; } template<typename T, typename U> std::ostream &operator<<(std::ostream &os, const std::pair<T, U> &a) { return os << "(" << a.first << ", " << a.second << ")"; } template<typename Container> std::ostream &print_seq(const Container &a, std::string_view sep = " ", std::string_view ends = "\n", std::ostream &os = std::cout) { auto b = std::begin(a), e = std::end(a); for (auto it = std::begin(a); it != e; ++it) { if (it != b) os << sep; os << *it; } return os << ends; } template<typename T, typename = void> struct is_iterable : std::false_type {}; template<typename T> struct is_iterable<T, std::void_t<decltype(std::begin(std::declval<T>())), decltype(std::end(std::declval<T>()))>> : std::true_type { }; template<typename T, typename = std::enable_if_t< is_iterable<T>::value && !std::is_same<T, std::string_view>::value && !std::is_same<T, std::string>::value>> std::ostream &operator<<(std::ostream &os, const T &a) { return print_seq(a, ", ", "", (os << "{")) << "}"; } void print() { std::cout << "\n"; } template<class T> void print(const T &x) { std::cout << x << "\n"; } template<typename Head, typename... Tail> void print(const Head &head, Tail... tail) { std::cout << head << " "; print(tail...); } struct Input { template<typename T> operator T() const { T x; std::cin >> x; return x; } } in; #ifdef MY_DEBUG #include "debug_dump.hpp" #else #define DUMP(...) #endif using namespace std; template<int sign = 1> struct Infinity { template<typename T> constexpr operator T() const { static_assert(sign == 1 or not std::is_unsigned_v<T>, "must be positive in an unsigned type"); if constexpr (std::numeric_limits<T>::has_infinity) { return T(sign) * std::numeric_limits<T>::infinity(); } else { return T(sign) * (std::numeric_limits<T>::max() / T(2)); } } constexpr Infinity<sign * -1> operator-() const { return {}; } template<typename T> friend constexpr bool operator==(const T &x, const Infinity &y) { return x == T(y); } template<typename T> friend constexpr bool operator!=(const T &x, const Infinity &y) { return x != T(y); } }; constexpr Infinity<> kBig; #include <boost/multiprecision/cpp_int.hpp> using i128 = boost::multiprecision::checked_int128_t; namespace multip = boost::multiprecision; template<class F> i64 bisect(i64 true_x, i64 false_x, F pred) { static_assert(std::is_invocable_r_v<bool, F, i64>, "F must be: i64 -> bool"); assert(std::max<i64>(true_x, false_x) <= std::numeric_limits<i64>::max() / 2); // To allow negative values, use floor_div() in the loop. assert(true_x >= -1 and false_x >= -1); using u64 = unsigned long long; while (std::abs(true_x - false_x) > 1) { i64 mid = ((u64) true_x + (u64) false_x) / 2; if (pred(mid)) { true_x = std::move(mid); } else { false_x = std::move(mid); } } return true_x; } template<typename T> T power(T b, i64 e) { assert(e >= 0); T x = 1; while (e > 0) { if (e & 1) x *= b; b *= b; e >>= 1; } return x; } auto solve() { const i64 n = in; i64 ans = n; for (i64 j = 2; (1LL << j) <= n; ++j) { auto im = bisect(1, n, [&](i64 x) -> bool { i128 y = 1; REP(p, j) { y *= x; if (y > n) return false; } return y <= n; }); i128 ij = power<i128>(im, j); i64 k = n - i64(ij); chmin(ans, im + j + k); } return ans; } auto main() -> int { ios_base::sync_with_stdio(false), cin.tie(nullptr); cout << std::fixed << std::setprecision(18); const int t = 1; REP(test_case, t) { auto ans = solve(); print(ans); } }