結果
| 問題 |
No.2756 GCD Teleporter
|
| コンテスト | |
| ユーザー |
👑 |
| 提出日時 | 2024-05-10 22:59:27 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 182 ms / 2,000 ms |
| コード長 | 3,361 bytes |
| コンパイル時間 | 4,354 ms |
| コンパイル使用メモリ | 261,520 KB |
| 最終ジャッジ日時 | 2025-02-21 13:08:36 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 36 |
ソースコード
#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef vector<int> vi;
typedef vector<long long> vl;
typedef vector<vector<int>> vvi;
typedef vector<vector<long long>> vvl;
typedef long double ld;
typedef pair<int, int> P;
ostream& operator<<(ostream& os, const modint& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const static_modint<m>& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const dynamic_modint<m>& a) {os << a.val(); return os;}
template<typename T> istream& operator>>(istream& is, vector<T>& v){int n = v.size(); assert(n > 0); rep(i, n) is >> v[i]; return is;}
template<typename U, typename T> ostream& operator<<(ostream& os, const pair<U, T>& p){os << p.first << ' ' << p.second; return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : " "); return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : ""); return os;}
template<typename T> void chmin(T& a, T b){a = min(a, b);}
template<typename T> void chmax(T& a, T b){a = max(a, b);}
// Sieve of Eratosthenes
// https://youtu.be/UTVg7wzMWQc?t=2774
struct Sieve {
int n;
vector<int> f, primes;
Sieve(int n=1):n(n), f(n+1) {
f[0] = f[1] = -1;
for (ll i = 2; i <= n; ++i) {
if (f[i]) continue;
primes.push_back(i);
f[i] = i;
for (ll j = i*i; j <= n; j += i) {
if (!f[j]) f[j] = i;
}
}
}
bool isPrime(int x) { return f[x] == x;}
vector<int> factorList(int x) {
vector<int> res;
while (x != 1) {
res.push_back(f[x]);
x /= f[x];
}
return res;
}
vector<pair<ll,int>> factor(ll x) {
vector<pair<ll,int>> res;
for (int p : primes) {
int y = 0;
while (x%p == 0) x /= p, ++y;
if (y != 0) res.emplace_back(p,y);
}
if (x != 1) res.emplace_back(x,1);
return res;
}
int num_of_divisors(long long x){
auto f = factor(x);
long long res = 1;
for(auto [p, val] : f){
res *= val + 1;
}
return res;
}
set<long long> divisors(long long x){
set<long long> se = {1};
auto f = factor(x);
for(auto [key, value] : f){
set<long long> old = se;
for(long long y : old){
rep(i, value + 1){
se.insert(y);
y *= key;
}
}
}
return se;
}
};
const int M = 200000;
int main(){
Sieve sieve(500);
int n;
cin >> n;
vector<int> a(n);
cin >> a;
auto p = sieve.primes;
int m = p.size();
vector<vector<int>> v(M + 1);
rep(i, n){
rep(j, m){
bool success = false;
while(a[i] % p[j] == 0){
success = true;
a[i] /= p[j];
}
if(success) v[p[j]].push_back(i);
}
if(a[i] > 1) v[a[i]].push_back(i);
}
dsu uf(n);
bool two = false;
bool three = false;
rep(j, M + 1){
int sz = v[j].size();
if(j == 2 and sz >= 1) two = true;
if(j == 3 and sz >= 1) three = true;
rep(k, sz - 1) uf.merge(v[j][k], v[j][k + 1]);
}
int sz = uf.groups().size();
if(sz == 1){
cout << "0\n";
return 0;
}
if(two){
cout << (sz - 1) * 2 << "\n";
return 0;
}
if(three && sz == 2){
cout << 3 << "\n";
return 0;
}
cout << 2 * sz << "\n";
return 0;
}