結果
| 問題 |
No.719 Coprime
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-02-28 15:38:32 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,715 bytes |
| コンパイル時間 | 928 ms |
| コンパイル使用メモリ | 108,004 KB |
| 実行使用メモリ | 6,948 KB |
| 最終ジャッジ日時 | 2024-10-02 18:15:11 |
| 合計ジャッジ時間 | 14,029 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| other | AC * 17 WA * 44 |
ソースコード
// {{{
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <climits>
#include <iostream>
#include <iomanip>
#include <algorithm>
#include <vector>
#include <list>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <queue>
#include <stack>
#include <string>
#include <numeric>
#include <complex>
#include <utility>
#include <type_traits>
#include <functional>
using namespace std;
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define FOR(i, a, b) for(ll i = static_cast<ll>(a); i < static_cast<ll>(b); ++i)
#define FORR(i, a, b) for(ll i = static_cast<ll>(a); i >= static_cast<ll>(b); --i)
#define REP(i, n) FOR(i, 0, n)
#define REPR(i, n) FORR(i, n, 0)
#define ALL(x) (x).begin(), (x).end()
#define DBG(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << endl;
using ll = long long;
using ull = unsigned long long;
using P = pair<int, int>;
using LP = pair<ll, ll>;
using IP = pair<int, P>;
using LLP = pair<ll, LP>;
const int dx[] = {1, -1, 0, 0};
const int dy[] = {0, 0, 1, -1};
constexpr int INF = 100000000;
constexpr ll LINF = 10000000000000000ll;
constexpr int MOD = static_cast<int>(1e9 + 7);
constexpr double EPS = 1e-9;
// {{{ popcount
static int popcount(int x) {
return __builtin_popcount(static_cast<unsigned int>(x));
}
static int popcount(unsigned int x) {
return __builtin_popcount(x);
}
static int popcount(long x) {
return __builtin_popcountl(static_cast<unsigned long>(x));
}
static int popcount(unsigned long x) {
return __builtin_popcountl(x);
}
static int popcount(long long x) {
return __builtin_popcountll(static_cast<unsigned long long>(x));
}
static int popcount(unsigned long long x) {
return __builtin_popcountll(x);
}
// }}}
// template specialization of std::hash for std::pair
namespace std {
template<typename T, typename U>
struct hash<pair<T, U> > {
size_t operator()(const pair<T, U> &key) const noexcept {
size_t h1 = hash<T>()(key.first);
size_t h2 = hash<U>()(key.second);
return h1 ^ (h2 << 1);
}
};
} // namespace std
// print vector
template<typename T>
ostream &operator<<(ostream &os, const vector<T> &v) {
size_t sz = v.size();
os << "[";
for (size_t i = 0; i < sz-1; i++) {
os << v[i] << ", ";
}
os << v[sz-1] << "]";
return os;
}
// print array (except char literal)
template<
typename T,
int N,
typename std::enable_if<!std::is_same<T, char>::value, std::nullptr_t>::type = nullptr>
ostream &operator<<(ostream &os, const T (&v)[N]) {
os << "[";
for (size_t i = 0; i < N-1; i++) {
os << v[i] << ", ";
}
os << v[N-1] << "]";
return os;
}
// print array
template<typename T>
void printArray(T *arr, size_t sz) {
cerr << "[";
for (size_t i = 0; i < sz-1; i++) {
cerr << arr[i] << ",";
}
if (sz > 0) cerr << arr[sz-1];
cerr << "]" << endl;
}
// print pair
template<typename T, typename U>
ostream &operator<<(ostream &os, const pair<T, U> &p) {
os << "(" << p.first << ", " << p.se << ")";
return os;
}
static inline ll mod(ll x, ll m)
{
ll y = x % m;
return (y >= 0 ? y : y+m);
}
struct Compare {
//vector<ll> &x_, &y_;
//Compare(vector<ll> &x, vector<ll> &y): x_(x), y_(y) {}
//bool operator()(const P &lhs, const P &rhs) {
// return x_[lhs.fi]+y_[lhs.se] < x_[rhs.fi]+y_[rhs.se];
//}
bool operator()(const int x, const int y) {
return x < y;
}
};
// print floating-point number
// cout << fixed << setprecision(12) <<
// }}}
int N;
bool prime[100000];
vector<int> p;
void sieve(ll n)
{
REP (i, n+1) prime[i] = true;
prime[0] = prime[1] = false;
FOR (i, 2, n+1) {
if (prime[i]) {
p.pb(i);
for (ll j = 2*i; j <= n; j += i) {
prime[j] = false;
}
}
}
}
bool isCoprime(int x, int y)
{
bool ret = true;
for (int i: p) {
if (i > min(x, y)) break;
if (x % i == 0 && y % i == 0) {
return false;
}
}
return true;
}
void solve()
{
sieve(N);
int ret = 0;
FORR (x, N, 2) {
vector<int> s;
FORR (i, x, 2) {
bool ok = true;
for (int v: s) {
if (!isCoprime(i, v)) {
ok = false;
break;
}
}
if (ok) s.pb(i);
}
int t = 0;
for (int v: s) t += v;
ret = max(ret, t);
}
cout << ret << endl;
}
int main()
{
cin.tie(0);
ios::sync_with_stdio(false);
cin >> N;
solve();
return 0;
}
// vim:set foldmethod=marker: