結果
| 問題 | No.732 3PrimeCounting |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2018-09-07 22:59:15 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 5,206 bytes |
| 記録 | |
| コンパイル時間 | 2,086 ms |
| コンパイル使用メモリ | 215,944 KB |
| 最終ジャッジ日時 | 2025-01-06 13:06:41 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 66 TLE * 23 |
ソースコード
#pragma GCC optimize ("O3")
#include "bits/stdc++.h"
using namespace std;
using ll = long long int;
#define debugos cout
#define debug(v) {printf("L%d %s > ",__LINE__,#v);debugos<<(v)<<endl;}
#define debugv(v) {printf("L%d %s > ",__LINE__,#v);for(auto e:(v)){debugos<<e<<" ";}debugos<<endl;}
#define debuga(m,w) {printf("L%d %s > ",__LINE__,#m);for(int x=0;x<(w);x++){debugos<<(m)[x]<<" ";}debugos<<endl;}
#define debugaa(m,h,w) {printf("L%d %s >\n",__LINE__,#m);for(int y=0;y<(h);y++){for(int x=0;x<(w);x++){debugos<<(m)[y][x]<<" ";}debugos<<endl;}}
#define ALL(v) (v).begin(),(v).end()
#define repeat(cnt,l) for(remove_reference<remove_const<decltype(l)>::type>::type cnt=0;(cnt)<(l);++(cnt))
#define rrepeat(cnt,l) for(auto cnt=(l)-1;0<=(cnt);--(cnt))
#define iterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);++(cnt))
#define diterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);--(cnt))
const ll MD = 1000000007ll; const long double PI = 3.1415926535897932384626433832795L;
inline void assert_call(bool assertion, function<void()> f) { if (!assertion) { cerr << "assertion fault:" << endl; f(); abort(); } }
template<typename T1, typename T2> inline ostream& operator <<(ostream &o, const pair<T1, T2> p) { o << '(' << p.first << ':' << p.second << ')'; return o; }
template<typename Vec> inline ostream& _ostream_vecprint(ostream& os, const Vec& a) {
os << '['; for (const auto& e : a) os << ' ' << e << ' '; os << ']'; return os;
}
template<typename T> inline ostream& operator<<(ostream& o, const vector<T>& v) { return _ostream_vecprint(o, v); }
template<typename T, size_t S> inline ostream& operator<<(ostream& o, const array<T, S>& v) { return _ostream_vecprint(o, v); }
template<typename T> inline T& maxset(T& to, const T& val) { return to = max(to, val); }
template<typename T> inline T& minset(T& to, const T& val) { return to = min(to, val); }
void bye(string s, int code = 0) { cout << s << endl; exit(code); }
mt19937_64 randdev(8901016);
template<typename T> inline T rand(T l, T h) { return uniform_int_distribution<T>(l, h)(randdev); }
template<> inline double rand<double>(double l, double h) { return uniform_real_distribution<double>(l, h)(randdev); }
template<> inline float rand<float>(float l, float h) { return uniform_real_distribution<float>(l, h)(randdev); }
template<int Max = 2000>
class IsPrimeC {
bool d_[Max + 1];
template<typename T>
static T cesqrt(T s) {
double x = s / 2.0;
double prev = 0.0;
while (x != prev) {
prev = x;
x = (x + s / x) / 2.0;
}
return x;
}
public:
IsPrimeC() : d_() {
d_[0] = d_[1] = 1;
int sqh = cesqrt<int>(Max);
for (int i = 2; i <= sqh; i++) {
if (d_[i] == 0) {
for (int j = i * i; j <= Max; j += i) { // i*i
d_[j] = 1;
}
}
}
for (int i = 0; i <= Max; ++i) d_[i] = !d_[i];
}
inline bool operator[](int x) const { return d_[x]; }
};
template<int Max = 2000>
class PrimeList {
int d_[Max];
public:
PrimeList() : d_() {
int n = 1;
d_[0] = 2;
for (int x = 3; n < Max; ++x) {
bool f = true;
for (int i = 0; d_[i] * d_[i] <= x; ++i)
if (x % d_[i] == 0) { f = false; break; }
if (f) d_[n++] = x;
}
}
inline int operator[](int x) const { return d_[x]; }
template<int Max_>
class iterator {
const PrimeList<Max_>& pl;
int ptr = 0;
public:
iterator(const decltype(pl)& _pl, int _ptr = 0) :pl(_pl), ptr(_ptr) { }
int operator*() const { return pl[ptr]; }
iterator<Max_>& operator++() { ptr++; return *this; } // prefix
inline bool operator!=(const iterator<Max_>& it) const { return ptr != it.ptr ? !(Max < ptr && Max < it.ptr) : false; }
inline bool operator==(const iterator<Max_>& it) const { return ptr != it.ptr ? (Max < ptr && Max < it.ptr) : true; }
};
PrimeList::iterator<Max> begin() const { return PrimeList::iterator<Max>(*this, 0); }
PrimeList::iterator<Max> end() const { return PrimeList::iterator<Max>(*this, Max); }
};
IsPrimeC<300001> isPrime;
PrimeList<300001> primeList;
ll N;
int main() {
cin >> N;
vector<ll> dp;
dp.resize(300001);
int last = 0;
for (last = 0; primeList[last] <= N; ++last) {
dp[primeList[last]] = 1;
}
repeat(_, 2) {
vector<ll> dp2(300001);
rrepeat(i, last) {
int p = primeList[i];
repeat(j, 300001) {
if (!j) continue;
if (j + p > 3 * N) continue;
dp2[j + p] += dp[j];
}
}
dp.swap(dp2);
}
ll ans = 0;
for (ll p : primeList) {
if (p >= dp.size()) break;
ans += dp[p];
}
for (int i = 0; primeList[i] <= N; ++i) {
int vi = primeList[i];
for (int j = i + 1; primeList[j] <= N; ++j) {
if (vi * 2 + primeList[j] >= dp.size()) break;
ans -= isPrime[vi * 2 + primeList[j]] * 3;
ans -= isPrime[vi + primeList[j]*2] * 3;
}
}
cout << ans/6 << endl;
return 0;
}