結果
| 問題 |
No.873 バイナリ、ヤバいなり!w
|
| コンテスト | |
| ユーザー |
noshi91
|
| 提出日時 | 2023-02-28 17:53:10 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 209 ms / 2,000 ms |
| コード長 | 3,262 bytes |
| コンパイル時間 | 2,096 ms |
| コンパイル使用メモリ | 195,568 KB |
| 最終ジャッジ日時 | 2025-02-11 00:12:56 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 36 |
コンパイルメッセージ
main.cpp: In function ‘void n91::main_()’:
main.cpp:111:14: warning: ‘ret’ may be used uninitialized [-Wmaybe-uninitialized]
111 | m -= c * c;
| ~~^~~
main.cpp:103:15: note: ‘ret’ was declared here
103 | usize ret;
| ^~~
ソースコード
//#define NDEBUG
#include <cstddef>
#include <cstdint>
#include <iostream>
#include <bits/stdc++.h>
namespace n91 {
using i8 = std::int_fast8_t;
using i32 = std::int_fast32_t;
using i64 = std::int_fast64_t;
using u8 = std::uint_fast8_t;
using u32 = std::uint_fast32_t;
using u64 = std::uint_fast64_t;
using isize = std::ptrdiff_t;
using usize = std::size_t;
constexpr usize operator"" _z(unsigned long long x) noexcept {
return static_cast<usize>(x);
}
class rep {
const usize f, l;
public:
class itr {
friend rep;
usize i;
constexpr itr(const usize x) noexcept : i(x) {}
public:
void operator++() noexcept { ++i; }
constexpr usize operator*() const noexcept { return i; }
constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
};
constexpr rep(const usize first, const usize last) noexcept
: f(first), l(last) {}
constexpr itr begin() const noexcept { return itr(f); }
constexpr itr end() const noexcept { return itr(l); }
};
class revrep {
const usize f, l;
public:
class itr {
friend revrep;
usize i;
constexpr itr(usize x) noexcept : i(x) {}
public:
void operator++() noexcept { --i; }
constexpr usize operator*() const noexcept { return i; }
constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
};
constexpr revrep(usize first, usize last) noexcept : f(--first), l(--last) {}
constexpr itr begin() const noexcept { return itr(l); }
constexpr itr end() const noexcept { return itr(f); }
};
template <class T> using vec_alias = std::vector<T>;
template <class T> auto md_vec(const usize n, const T& value) {
return std::vector<T>(n, value);
}
template <class... Args> auto md_vec(const usize n, Args... args) {
return std::vector<decltype(md_vec(args...))>(n, md_vec(args...));
}
template <class T> constexpr T difference(const T& a, const T& b) {
return a < b ? b - a : a - b;
}
template <class T> T scan() {
T ret;
std::cin >> ret;
return ret;
}
} // namespace n91
#include <algorithm>
#include <iostream>
#include <string>
#include <utility>
namespace n91 {
void main_() {
const usize n = scan<usize>();
std::string ans;
std::vector<usize> dp(n + 1_z, std::numeric_limits<usize>::max());
for (const auto i : rep(1_z, n + 1_z)) {
for (usize j = 1_z; j * j <= i; ++j) {
dp[i] = std::min(dp[i], dp[i - j * j] + j);
}
}
usize m = n;
char next = '0';
constexpr char ex = '0' ^ '1';
while (m != 0_z) {
usize c = [&]() {
for (usize j = next == '0' ? 1_z : 2_z; j * j <= m; j += 2_z) {
if (dp[m] == dp[m - j * j] + j) {
return j;
}
}
usize ret;
for (usize j = next == '0' ? 2_z : 1_z; j * j <= m; j += 2_z) {
if (dp[m] == dp[m - j * j] + j) {
ret = j;
}
}
return ret;
}();
m -= c * c;
for (const auto i : rep(0_z, c)) {
ans.push_back(next);
next ^= ex;
}
next ^= ex;
}
std::cout << ans << std::endl;
}
} // namespace n91
int main() {
n91::main_();
return 0;
}
noshi91