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 21:40:22 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 606 ms / 2,000 ms |
| コード長 | 3,377 bytes |
| コンパイル時間 | 4,237 ms |
| コンパイル使用メモリ | 239,900 KB |
| 実行使用メモリ | 14,208 KB |
| 最終ジャッジ日時 | 2024-11-08 05:01:50 |
| 合計ジャッジ時間 | 12,515 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 31 |
コンパイルメッセージ
main.cpp: In function 'int main()':
main.cpp:65:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
65 | for(auto [p,_]:prim){
| ^
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>;
vector<pll>prime_factrization(ll n){
vector<pll>res;
for(ll i=2;i*i<=n;i++){
ll cnt=0;
while(n%i==0){
cnt++;
n/=i;
}
if(cnt)res.push_back({i,cnt});
}
if(n>1)res.push_back({n,1});
return res;
}
int main(void) {
cin.tie(nullptr);
ios::sync_with_stdio(false);
ll N,K;cin>>N>>K;
v1d a(N);cin>>a;
using mint=modint1000000007;
if(K==1){pt(mint(2).pow(N)-1);return 0;};
vector<pll>prim=prime_factrization(K);
ll M=prim.size();
v2d cnt(N);
for(ll i=0;i<N;i++){
v1d v;
for(auto [p,_]:prim){
ll t=0;
while(a[i]%p==0){
t++;
a[i]/=p;
}
v.push_back(t);
}
cnt[i]=v;
}
auto convert=[&](v1d v){
ll res=0;
for(ll i=0;i<M-1;i++){
ll base=prim[i+1].second+1;
res+=v[i];
res*=base;
}
res+=v.back();
return res;
};
auto rev=[&](ll S){
v1d res;
for(ll i=M-1;i>=1;i--){
ll base=prim[i].second+1;
res.push_back(S%base);
S/=base;
}
res.push_back(S);
reverse(all(res));
return res;
};
ll S=1;
for(ll i=0;i<M;i++)S*=prim[i].second+1;
vector<vector<mint>>dp(N+1,vector<mint>(S));
dp[0][0]=1;
for(ll i=0;i<N;i++){
for(ll j=0;j<S;j++){
dp[i+1][j]+=dp[i][j];
v1d v=rev(j);
for(ll k=0;k<M;k++){
v[k]+=cnt[i][k];
chmin(v[k],prim[k].second);
}
ll nxt=convert(v);
if(nxt<S)dp[i+1][nxt]+=dp[i][j];
}
}
pt(dp[N][S-1]);
}