結果

問題 No.910 素数部分列
ユーザー jell
提出日時 2019-10-18 22:56:50
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 4 ms / 1,000 ms
コード長 10,377 bytes
コンパイル時間 1,432 ms
コンパイル使用メモリ 123,792 KB
実行使用メモリ 5,376 KB
最終ジャッジ日時 2024-06-25 21:49:45
合計ジャッジ時間 2,984 ms
ジャッジサーバーID
(参考情報)
judge1 / judge4
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 50
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp:297:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  297 | main()
      | ^~~~

ソースコード

diff #
プレゼンテーションモードにする

#ifdef stderr_path
#define LOCAL
#endif
#ifdef LOCAL
#define _GLIBCXX_DEBUG
#else
#pragma GCC optimize("Ofast")
#endif
#include <algorithm>
#include <bitset>
#include <cassert>
#include <chrono>
#include <complex>
#include <cstring>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <unordered_map>
#include <unordered_set>
// #define NDEBUG
#define __precision__ 10
#define debug_stream std::cerr
#define iostream_untie true
#define all(v) std::begin(v), std::end(v)
#define rall(v) std::rbegin(v), std::rend(v)
#define __odd(n) ((n) & 1)
#define __even(n) (not __odd(n))
#define __popcount(n) __builtin_popcountll(n)
#define __clz32(n) __builtin_clz(n)
#define __clz64(n) __builtin_clzll(n)
#define __ctz32(n) __builtin_ctz(n)
#define __ctz64(n) __builtin_ctzll(n)
using i32 = int_fast32_t;
using i64 = int_fast64_t;
using ui32 = uint_fast32_t;
using ui64 = uint_fast64_t;
using pii = std::pair<i32, i32>;
using pll = std::pair<i64, i64>;
template <class T> using heap = std::priority_queue<T>;
template <class T> using minheap = std::priority_queue<T, std::vector<T>, std::greater<T>>;
template <class T> constexpr T inf = std::numeric_limits<T>::max() / T(2) - T(1123456);
namespace execution
{
std::chrono::system_clock::time_point start_time, end_time;
void print_elapsed_time()
{
end_time = std::chrono::system_clock::now();
std::cerr << "\n----- Exec time : ";
std::cerr << std::chrono::duration_cast<std::chrono::milliseconds>(
end_time - start_time)
.count();
std::cerr << " ms -----\n\n";
}
struct setupper
{
setupper()
{
if(iostream_untie)
{
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
}
std::cout << std::fixed << std::setprecision(__precision__);
#ifdef stderr_path
if(freopen(stderr_path, "a", stderr))
{
std::cerr << std::fixed << std::setprecision(__precision__);
}
#endif
#ifdef stdout_path
if(not freopen(stdout_path, "w", stdout))
{
freopen("CON", "w", stdout);
std::cerr << "Failed to open the stdout file\n\n";
}
std::cout << "";
#endif
#ifdef stdin_path
if(not freopen(stdin_path, "r", stdin))
{
freopen("CON", "r", stdin);
std::cerr << "Failed to open the stdin file\n\n";
}
#endif
#ifdef LOCAL
std::cerr << "----- stderr at LOCAL -----\n\n";
atexit(print_elapsed_time);
start_time = std::chrono::system_clock::now();
#else
fclose(stderr);
#endif
}
} __setupper;
} // namespace execution
class myclock_t
{
std::chrono::system_clock::time_point built_pt, last_pt;
int built_ln, last_ln;
std::string built_func, last_func;
bool is_built;
public:
explicit myclock_t() : is_built(false) {}
void build(int crt_ln, const std::string &crt_func)
{
is_built = true;
last_pt = built_pt = std::chrono::system_clock::now();
last_ln = built_ln = crt_ln, last_func = built_func = crt_func;
}
void set(int crt_ln, const std::string &crt_func)
{
if(is_built)
{
last_pt = std::chrono::system_clock::now();
last_ln = crt_ln, last_func = crt_func;
}
else
{
debug_stream << "[ " << crt_ln << " : " << crt_func << " ] "
<< "myclock_t::set failed (yet to be built!)\n";
}
}
void get(int crt_ln, const std::string &crt_func)
{
if(is_built)
{
std::chrono::system_clock::time_point crt_pt(
std::chrono::system_clock::now());
int64_t diff =
std::chrono::duration_cast<std::chrono::milliseconds>(crt_pt -
last_pt)
.count();
debug_stream << diff << " ms elapsed from"
<< " [ " << last_ln << " : " << last_func << " ]";
if(last_ln == built_ln) debug_stream << " (when built)";
debug_stream << " to"
<< " [ " << crt_ln << " : " << crt_func << " ]"
<< "\n";
last_pt = built_pt, last_ln = built_ln, last_func = built_func;
}
else
{
debug_stream << "[ " << crt_ln << " : " << crt_func << " ] "
<< "myclock_t::get failed (yet to be built!)\n";
}
}
};
#ifdef LOCAL
myclock_t __myclock;
#define build_clock() __myclock.build(__LINE__, __func__)
#define set_clock() __myclock.set(__LINE__, __func__)
#define get_clock() __myclock.get(__LINE__, __func__)
#else
#define build_clock() ((void)0)
#define set_clock() ((void)0)
#define get_clock() ((void)0)
#endif
namespace std
{
template <class RAitr> void rsort(RAitr __first, RAitr __last) { sort(__first, __last, greater<>()); }
template <class T> size_t hash_combine(size_t seed, T const &key) { return seed ^ (hash<T>()(key) + 0x9e3779b9 + (seed << 6) + (seed >> 2)); }
template <class T, class U>
struct hash<pair<T, U>>
{
size_t operator()(pair<T, U> const &pr) const
{
return hash_combine(hash_combine(0, pr.first), pr.second);
}
};
template <class tuple_t, size_t index = tuple_size<tuple_t>::value - 1>
struct tuple_hash_calc
{
static size_t apply(size_t seed, tuple_t const &t)
{
return hash_combine(
tuple_hash_calc<tuple_t, index - 1>::apply(seed, t),
get<index>(t));
}
};
template <class tuple_t>
struct tuple_hash_calc<tuple_t, 0>
{
static size_t apply(size_t seed, tuple_t const &t)
{
return hash_combine(seed, get<0>(t));
}
};
template <class... T>
struct hash<tuple<T...>>
{
size_t operator()(tuple<T...> const &t) const { return tuple_hash_calc<tuple<T...>>::apply(0, t); }
};
template <class T, class U> istream &operator>>(std::istream &s, pair<T, U> &p) { return s >> p.first >> p.second; }
template <class T, class U> ostream &operator<<(std::ostream &s, const pair<T, U> &p) { return s << p.first << " " << p.second; }
template <class T> istream &operator>>(istream &s, vector<T> &v) { for(T &e : v) s >> e; return s; }
template <class T>
ostream &operator<<(ostream &s, const vector<T> &v)
{
bool is_front = true;
for(const T &e : v)
{
if(not is_front) s << ' ';
else is_front = false;
s << e;
}
return s;
}
template <class tuple_t, size_t index>
struct tupleos
{
static ostream &apply(ostream &s, const tuple_t &t)
{
tupleos<tuple_t, index - 1>::apply(s, t);
return s << " " << get<index>(t);
}
};
template <class tuple_t>
struct tupleos<tuple_t, 0>
{
static ostream &apply(ostream &s, const tuple_t &t) { return s << get<0>(t); }
};
template <class... T>
ostream &operator<<(ostream &s, const tuple<T...> &t)
{ return tupleos<tuple<T...>, tuple_size<tuple<T...>>::value - 1>::apply(s, t); }
template <> ostream &operator<<(ostream &s, const tuple<> &t) { return s; }
string revstr(string str) { reverse(str.begin(), str.end()); return str; }
} // namespace std
#ifdef LOCAL
#define dump(...) \
debug_stream << "[ " << __LINE__ << " : " << __FUNCTION__ << " ]\n", \
dump_func(#__VA_ARGS__, __VA_ARGS__)
template <class T>
void dump_func(const char *ptr, const T &x)
{
debug_stream << '\t';
for(char c = *ptr; c != '\0'; c = *++ptr)
{
if(c != ' ') debug_stream << c;
}
debug_stream << " : " << x << '\n';
}
template <class T, class... rest_t>
void dump_func(const char *ptr, const T &x, rest_t... rest)
{
debug_stream << '\t';
for(char c = *ptr; c != ','; c = *++ptr)
{
if(c != ' ') debug_stream << c;
}
debug_stream << " : " << x << ",\n";
dump_func(++ptr, rest...);
}
#else
#define dump(...) ((void)0)
#endif
template <class P>
void read_range(P __first, P __second) { for(P i = __first; i != __second; ++i) std::cin >> *i; }
template <class P> void write_range(P __first, P __second)
{ for(P i = __first; i != __second; std::cout << (++i == __second ? '\n' : ' ')) std::cout << *i; }
// substitue y for x if x > y.
template <class T> bool chmin(T &x, const T &y) { return x > y ? x = y, true : false; }
// substitue y for x if x < y.
template <class T> bool chmax(T &x, const T &y) { return x < y ? x = y, true : false; }
// binary search.
int_fast64_t bin(int_fast64_t ok, int_fast64_t ng,
const std::function<bool(int_fast64_t)> &f)
{
while(std::abs(ok - ng) > 1)
{
int_fast64_t mid = (ok + ng) / 2;
(f(mid) ? ok : ng) = mid;
}
return ok;
}
// be careful that val is type-sensitive.
template <class T, class A, size_t N> void init(A (&array)[N], const T &val) { std::fill((T *)array, (T *)(array + N), val); }
template <class A> void reset(A &array) { memset(array, 0, sizeof(array)); }
/* The main code follows. */
using namespace std;
main()
{
void __solve();
ui32 t = 1;
#ifdef LOCAL
t = 1;
#endif
// cin >> t;
while(t--)
{
__solve();
}
}
void __solve()
{
i32 n; string s; cin>>n>>s;
i32 ans=0;
vector<i32> a;
i32 one=0;
i32 nin=0;
{
for(char c : s)
{
if(c=='1')
{
one++;
}
else if(c=='9')
{
if(one>0)
{
one--; ans++;
}
else
{
nin++;
}
}
else
{
ans++;
}
}
}
nin=min(nin,one*2);
ans+=nin/2;
one-=nin/2;
ans+=one/2;
cout << ans << "\n";
}
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