結果
| 問題 | No.1731 Product of Subsequence |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-11-06 22:58:39 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
AC
|
| 実行時間 | 236 ms / 2,000 ms |
| コード長 | 2,576 bytes |
| 記録 | |
| コンパイル時間 | 4,190 ms |
| コンパイル使用メモリ | 267,076 KB |
| 最終ジャッジ日時 | 2025-01-25 14:21:18 |
|
ジャッジサーバーID (参考情報) |
judge8 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 31 |
ソースコード
#include <atcoder/all>
using namespace atcoder;
#include <bits/stdc++.h>
#define all(a) (a.begin()),(a.end())
#define rall(a) (a.rbegin()),(a.rend())
using namespace std;
using ll=long long;
using ld=long double;
using pll=pair<ll,ll>;
template<class T>bool chmax(T &a, const T &b) {if(a<b) {a=b; return 1;} return 0;}
template<class T>bool chmin(T &a, const T &b) {if(b<a) {a=b; return 1;} return 0;}
template<class T1, class T2>istream& operator >> (istream& is, pair<T1,T2>& p) { is >> p.first >> p.second; return is; }
template<class T1, class T2>ostream& operator << (ostream& os, const pair<T1,T2>& p) { os << p.first << " " << p.second; return os;}
template<class T>istream& operator >> (istream& is, vector<T>& v) { for(T& x:v) is >> x; return is; }
template<class T>ostream& operator << (ostream& os, const vector<T>& v) {for(int i=0;i<v.size();i++) {os << v[i] << (i+1 == v.size() ? "":" ");} return os;}
//istream& operator >> (istream& is, modint1000000007& x) { unsigned int t; is >> t; x=t; return is; }
//istream& operator >> (istream& is, modint998244353& x) { unsigned int t; is >> t; x=t; return is; }
ostream& operator << (ostream& os, const modint1000000007& x) { os << x.val(); return os; }
ostream& operator << (ostream& os, const modint998244353& x) { os << x.val(); return os; }
template<class... A> void pt() { std::cout << "\n"; }
template<class... A> void pt_rest() { std::cout << "\n"; }
template<class T, class... A> void pt_rest(const T& first, const A&... rest) { std::cout << " " << first; pt_rest(rest...); }
template<class T, class... A> void pt(const T& first, const A&... rest) { std::cout << first; pt_rest(rest...); }
static const ll INF=1e18+7;
static const double PI=acos(-1);
static const double EPS=1e-10;
using v1d=vector<ll>;
using v2d=vector<v1d>;
using v3d=vector<v2d>;
using v4d=vector<v3d>;
v1d get_divisors(ll n){
vector<ll>res;
for(ll i=1;i*i<=n;i++){
if(n%i)continue;
res.push_back(i);
if(n/i!=i)res.push_back(n/i);
}
sort(all(res));
return res;
}
int main(void) {
cin.tie(nullptr);
ios::sync_with_stdio(false);
ll N,K;cin>>N>>K;
v1d a(N);cin>>a;
v1d div=get_divisors(K);
ll M=div.size();
v2d cnt(N);
for(ll i=0;i<N;i++)a[i]=gcd(a[i],K);
ll C=0;
map<ll,ll>ind;
for(auto g:div)ind[g]=C++;
using mint=modint1000000007;
vector<vector<mint>>dp(N+1,vector<mint>(C));
dp[0][0]=1;
for(ll i=0;i<N;i++){
for(ll j=0;j<C;j++){
dp[i+1][j]+=dp[i][j];
dp[i+1][ind[gcd(K,a[i]*div[j])]]+=dp[i][j];
}
}
pt(dp[N][C-1]-(K==1));
}