結果
問題 | No.1731 Product of Subsequence |
ユーザー |
|
提出日時 | 2021-11-06 22:58:39 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 236 ms / 2,000 ms |
コード長 | 2,576 bytes |
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)); }