結果
| 問題 | No.781 円周上の格子点の数え上げ |
| ユーザー |
 はむこ
|
| 提出日時 | 2017-05-28 23:13:14 |
| 言語 | C++11 (gcc 13.3.0) |
| 結果 |
AC
|
| 実行時間 | 61 ms / 2,000 ms |
| コード長 | 10,517 bytes |
| コンパイル時間 | 1,448 ms |
| コンパイル使用メモリ | 166,676 KB |
| 実行使用メモリ | 6,948 KB |
| 最終ジャッジ日時 | 2024-09-21 15:55:15 |
| 合計ジャッジ時間 | 2,364 ms |
|
ジャッジサーバーID （参考情報） |
judge2 / judge1 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| other | AC * 21 |
ソースコード
#include <bits/stdc++.h>
#include <sys/time.h>
using namespace std;
#define rep(i,n) for(long long i = 0; i < (long long)(n); i++)
#define repi(i,a,b) for(long long i = (long long)(a); i < (long long)(b); i++)
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define fi first
#define se second
#define mt make_tuple
#define mp make_pair
template<class T1, class T2> bool chmin(T1 &a, T2 b) { return b < a && (a = b, true); }
template<class T1, class T2> bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
#define exists find_if
#define forall all_of
using ll = long long; using vll = vector<ll>; using vvll = vector<vll>; using P = pair<ll, ll>;
using ld = long double; using vld = vector<ld>;
using vi = vector<int>; using vvi = vector<vi>; vll conv(vi& v) { vll r(v.size()); rep(i, v.size()) r[i] = v[i]; return r; }
using Pos = complex<double>;
template <typename T, typename U> ostream &operator<<(ostream &o, const pair<T, U> &v) { o << "(" << v.first << ", " << v.second << ")"; return o; }
template<size_t...> struct seq{}; template<size_t N, size_t... Is> struct gen_seq : gen_seq<N-1, N-1, Is...>{}; template<size_t... Is> struct gen_seq<0, Is...> : seq<Is...>{};
template<class Ch, class Tr, class Tuple, size_t... Is>
void print_tuple(basic_ostream<Ch,Tr>& os, Tuple const& t, seq<Is...>){ using s = int[]; (void)s{0, (void(os << (Is == 0? "" : ", ") << get<Is>(t)), 0)...}; }
template<class Ch, class Tr, class... Args>
auto operator<<(basic_ostream<Ch, Tr>& os, tuple<Args...> const& t) -> basic_ostream<Ch, Tr>& { os << "("; print_tuple(os, t, gen_seq<sizeof...(Args)>()); return os << ")"; }
ostream &operator<<(ostream &o, const vvll &v) { rep(i, v.size()) { rep(j, v[i].size()) o << v[i][j] << " "; o << endl; } return o; }
template <typename T> ostream &operator<<(ostream &o, const vector<T> &v) { o << '['; rep(i, v.size()) o << v[i] << (i != v.size()-1 ? ", " : ""); o << "]"; return o; }
template <typename T> ostream &operator<<(ostream &o, const set<T> &m) { o << '['; for (auto it = m.begin(); it != m.end(); it++) o << *it << (next(it) != m.end() ? ", " : ""); o << "]"; return o; }
template <typename T, typename U> ostream &operator<<(ostream &o, const map<T, U> &m) { o << '['; for (auto it = m.begin(); it != m.end(); it++) o << *it << (next(it) != m.end() ? ", " : ""); o << "]"; return o; }
template <typename T, typename U, typename V> ostream &operator<<(ostream &o, const unordered_map<T, U, V> &m) { o << '['; for (auto it = m.begin(); it != m.end(); it++) o << *it; o << "]"; return o; }
vector<int> range(const int x, const int y) { vector<int> v(y - x + 1); iota(v.begin(), v.end(), x); return v; }
template <typename T> istream& operator>>(istream& i, vector<T>& o) { rep(j, o.size()) i >> o[j]; return i;}
string bits_to_string(ll input, ll n=64) { string s; rep(i, n) s += '0' + !!(input & (1ll << i)); reverse(all(s)); return s; }
template <typename T> unordered_map<T, ll> counter(vector<T> vec){unordered_map<T, ll> ret; for (auto&& x : vec) ret[x]++; return ret;};
string substr(string s, P x) {return s.substr(x.fi, x.se - x.fi); }
struct ci : public iterator<forward_iterator_tag, ll> { ll n; ci(const ll n) : n(n) { } bool operator==(const ci& x) { return n == x.n; } bool operator!=(const ci& x) { return !(*this == x); } ci &operator++() { n++; return *this; } ll operator*() const { return n; } };
size_t random_seed; namespace std { using argument_type = P; template<> struct hash<argument_type> { size_t operator()(argument_type const& x) const { size_t seed = random_seed; seed ^= hash<ll>{}(x.fi); seed ^= (hash<ll>{}(x.se) << 1); return seed; } }; }; // hash for various class
namespace myhash{ const int Bsizes[]={3,9,13,17,21,25,29,33,37,41,45,49,53,57,61,65,69,73,77,81}; const int xor_nums[]={0x100007d1,0x5ff049c9,0x14560859,0x07087fef,0x3e277d49,0x4dba1f17,0x709c5988,0x05904258,0x1aa71872,0x238819b3,0x7b002bb7,0x1cf91302,0x0012290a,0x1083576b,0x76473e49,0x3d86295b,0x20536814,0x08634f4d,0x115405e8,0x0e6359f2}; const int hash_key=xor_nums[rand()%20]; const int mod_key=xor_nums[rand()%20]; template <typename T> struct myhash{ std::size_t operator()(const T& val) const { return (hash<T>{}(val)%mod_key)^hash_key; } }; };
template <typename T> class uset:public std::unordered_set<T,myhash::myhash<T>> { using SET=std::unordered_set<T,myhash::myhash<T>>; public: uset():SET(){SET::rehash(myhash::Bsizes[rand()%20]);} };
template <typename T,typename U> class umap:public std::unordered_map<T,U,myhash::myhash<T>> { public: using MAP=std::unordered_map<T,U,myhash::myhash<T>>; umap():MAP(){MAP::rehash(myhash::Bsizes[rand()%20]);} };
struct timeval start; double sec() { struct timeval tv; gettimeofday(&tv, NULL); return (tv.tv_sec - start.tv_sec) + (tv.tv_usec - start.tv_usec) * 1e-6; }
struct init_{init_(){ gettimeofday(&start, NULL); ios::sync_with_stdio(false); cin.tie(0); srand((unsigned int)time(NULL)); random_seed = RAND_MAX / 2 + rand() / 2; }} init__;
static const double EPS = 1e-14;
static const long long INF = 1e18;
static const long long mo = 1e9+7;
#define ldout fixed << setprecision(40)
ll ume[] = {
48,
48,
64,
64,
64,
64,
64,
72,
64,
72,
64,
64,
72,
80,
72,
72,
96,
72,
72,
64,
96,
64,
96,
80,
72,
72,
72,
80,
72,
96,
80,
72,
96,
96,
96,
96,
64,
72,
96,
80,
96,
96,
72,
80,
72,
96,
96,
80,
72,
96,
96,
72,
72,
96,
96,
96,
80,
96,
96,
80,
96,
96,
96,
96,
96,
96,
80,
96,
96,
96,
96,
96,
80,
96,
80,
96,
96,
96,
96,
64,
128,
96,
96,
96,
72,
72,
96,
96,
80,
96,
96,
96,
96,
96,
80,
96,
80,
96,
96,
96,
96,
96,
128,
80,
96,
96,
96,
96,
96,
96,
80,
96,
80,
128,
96,
80,
96,
96,
128,
96,
96,
96,
108,
80,
96,
96,
96,
96,
96,
96,
96,
128,
80,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
128,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
128,
96,
96,
96,
96,
96,
96,
128,
128,
128,
96,
96,
96,
96,
128,
96,
96,
96,
96,
120,
72,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
96,
128,
96,
128,
96,
96,
96,
96,
96,
128,
96,
96,
128,
96,
96,
64,
144,
96,
96,
96,
96,
96,
96,
96,
128,
96,
96,
96,
96,
96,
96,
96,
96,
96,
128,
96,
128,
96,
96,
96,
96,
128,
120,
96,
96,
128,
96,
96,
128,
96,
96,
80,
108,
128,
128,
96,
96,
128,
72,
96,
128,
96,
96,
96,
96,
96,
96,
96,
96,
96,
128,
96,
96,
144,
96,
128,
96,
96,
96,
96,
144,
96,
96,
96,
128,
96,
96,
128,
96,
96,
96,
96,
96,
128,
80,
128,
96,
96,
96,
96,
128,
96,
144,
96,
96,
96,
128,
96,
96,
128,
96,
96,
96,
96,
120,
96,
96,
96,
128,
96,
128,
96,
96,
96,
96,
96,
128,
96,
128,
96,
128,
128,
96,
96,
128,
96,
96,
96,
128,
96,
96,
96,
96,
128,
96,
128,
96,
128,
96,
96,
96,
96,
128,
112,
96,
144,
128,
128,
96,
96,
96,
128,
96,
108,
96,
128,
96,
120,
96,
96,
128,
128,
96,
96,
128,
96,
72,
128,
96,
96,
96,
128,
96,
128,
96,
96,
128,
96,
144,
96,
96,
96,
96,
144,
128,
96,
96,
96,
128,
96,
80,
96,
96,
80,
128,
96,
96,
96,
160,
96,
96,
128,
96,
96,
128,
96,
128,
128,
96,
128,
128,
96,
96,
96,
144,
96,
96,
128,
96,
96,
96,
96,
96,
128,
96,
128,
96,
96,
96,
96,
96,
128,
96,
96,
96,
96,
144,
128,
96,
96,
96,
96,
96,
128,
96,
96,
96,
128,
96,
96,
96,
144,
96,
96,
128,
128,
96,
96,
96,
128,
128,
96,
144,
96,
128,
128,
96,
120,
96,
128,
96,
96,
128,
128,
80,
128,
96,
128,
128,
96,
96,
128,
96,
96,
128,
96,
108,
96,
96,
128,
128,
128,
96,
96,
96,
144,
128,
128,
128,
96,
144,
128,
96,
128,
96,
96,
96,
128,
96,
160,
96,
128,
96,
96,
96,
96,
96,
96,
96,
128,
128,
120,
144,
128,
96,
96,
96,
96,
96,
144,
128,
128,
96,
128,
96,
96,
96,
96,
96,
128,
96,
96,
144,
96,
96,
96,
128,
128,
96,
96,
128,
96,
128,
96,
128,
96,
128,
120,
128,
96,
96,
96,
128,
96,
160,
96,
128,
96,
128,
128,
144,
128,
128,
96,
96,
96,
108,
96,
128,
96,
96,
128,
96,
128,
96,
96,
144,
112,
96,
128,
192,
96,
96,
96,
128,
128,
96,
128,
96,
128,
128,
96,
96,
96,
96,
128,
96,
128,
144,
96,
120,
96,
96,
96,
128,
96,
128,
96,
128,
128,
128,
96,
128,
96,
96,
96,
128,
96,
96,
128,
128,
96,
96,
96,
128,
128,
128,
144,
144,
128,
96,
128,
128,
128,
128,
128,
96,
144,
96,
96,
96,
128,
96,
128,
192,
96,
96,
96,
96,
128,
96,
96,
96,
128,
96,
96,
120,
96,
128,
128,
128,
96,
128,
128,
128,
96,
96,
128,
128,
96,
96,
128,
96,
144,
96,
128,
128,
96,
128,
96,
96,
96,
96,
144,
144,
128,
128,
128,
96,
96,
128,
96,
128,
96,
128,
128,
144,
128,
128,
128,
96,
96,
128,
96,
96,
128,
120,
128,
96,
128,
96,
128,
128,
144,
128,
128,
96,
128,
96,
96,
160,
128,
128,
96,
96,
128,
96,
128,
128,
96,
96,
128,
96,
96,
128,
144,
96,
128,
96,
128,
128,
96,
96,
96,
144,
96,
96,
96,
128,
144,
128,
96,
96,
128,
128,
96,
96,
96,
144,
120,
128,
96,
96,
144,
128,
128,
96,
96,
128,
128,
144,
128,
96,
96,
128,
128,
128,
128,
96,
96,
96,
128,
128,
96,
128,
96,
128,
96,
96,
160,
128,
96,
96,
128,
128,
96,
96,
128,
96,
144,
128,
96,
128,
128,
96,
128,
128,
128,
128,
96,
128,
128,
96,
128,
96,
96,
144,
96,
96,
96,
112,
144,
96,
144,
96,
96,
192,
128,
96,
96,
160,
96,
128,
128,
96,
96,
96,
192,
128,
96,
128,
96,
96,
128,
96,
128,
96,
144,
96,
128,
128,
96,
128,
96,
128,
128,
96,
128,
96,
160,
128,
128,
128,
128,
144,
128,
128,
128,
96,
96,
128,
96,
128,
96,
96,
128,
128,
128,
96,
128,
128,
120,
144,
128,
96,
144,
96,
128,
128,
96,
96,
144,
96,
96,
144,
96,
96,
128,
96,
144,
128,
96,
128,
128,
96,
96,
144,
128,
96,
128,
96,
128,
128,
96,
128,
80,
144,
144,
128,
96,
96,
128,
96,
128,
128,
96,
128,
120,
120,
128,
128,
128,
96,
96,
128,
96,
144,
128,
96,
128,
128,
144,
128,
128,
128,
120,
96,
128,
128,
128,
96,
96,
128,
96,
160,
128,
96,
128,
96,
96,
128,
128,
96,
128,
108,
192,
96,
128,
128,
96,
112,
128,
144,
128,
128,
128,
96,
128,
96,
96,
128,
128,
128,
144,
96,
128,
96,
128,
};
vector<bool> memo(10048901);
ll solve(ll x, ll y) {
if (x > y) return 0;
ll ret = 0;
repi(i, x, y+1) {
ll tmp = 0;
for (ll j = 1; j * j <= i; j++) {
if (memo[i-j*j])
tmp++;
}
chmax(ret, tmp);
}
return ret * 4ll;
}
int main(void) {
ll x, y; cin >> x >> y;
rep(i, 3170) {
memo[i*i] = 1;
}
// 12345, 52346
// を
// 12345-20000, 20001-30000, ..., 40001-50000, 50001-52346とする
if (y - x < 50000) {
cout << solve(x, y) << endl;
} else {
ll l = (x + 9999) / 10000 * 10000; // x,l
ll lp1 = l+1;
ll r = y / 10000 * 10000 + 1; // r,y
ll rm1 = r-1;
// cout << l << " " << r << endl;
ll ret = 0;
chmax(ret, solve(x, l));
repi(i, l/10000, (r-2)/10000) {
// cout << i << endl;
chmax(ret, ume[i]);
}
chmax(ret, solve(r, y));
cout << ret << endl;
}
return 0;
}