結果
| 問題 | No.1731 Product of Subsequence |
| コンテスト | |
| ユーザー |
👑 |
| 提出日時 | 2026-09-30 20:29:41 |
| 言語 | C++23(gnu拡張gcc16) (gcc 16.1.0 + boost 1.92.0 + ACL) |
| 結果 |
AC
不安定
|
| 実行時間 | 277 ms / 2,000 ms |
| + 333µs | |
| コード長 | 2,368 bytes |
| 記録 | |
| コンパイル時間 | 4,212 ms |
| コンパイル使用メモリ | 291,776 KB |
| 実行使用メモリ | 9,912 KB |
| 最終ジャッジ日時 | 2026-09-30 20:29:58 |
| 合計ジャッジ時間 | 9,579 ms |
|
ジャッジサーバーID (参考情報) |
judge3_0 / judge1_0 |
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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
#ifdef MAIN
bool __multi__ = 0;
using INT = long long;
namespace XK {
const INT mod = 1e9 + 7;
vector<ll> divisor(ull x){ vector<ll> ans; for(ull i = 1; i * i <= x; i++) if(x % i == 0) ans.push_back(i); rrep(i, 0, ans.size() - (ans.back() * ans.back() == x)) ans.push_back(x / ans[i]); return ans; }
void solve() {
INT N, K; cin >> N >> K;
V<ll> A(N); rep(i, N) cin >> A[i], A[i] = gcd(A[i], K);
auto div = divisor(K);
// div.pb(K);
#ifdef DEBUG
rep(i, sz(div)) cout << div[i] << " \n"[i == sz(div) - 1];
#endif
unordered_map<int, ll> f;
rep(i, sz(div)) f[i] = 0;
f[1] = 1;
rep(i, N) {
unordered_map<int, ll> nf;
rep(j, sz(div)) {
(nf[div[j]] += f[div[j]]) %= mod;
(nf[gcd(K, A[i] * div[j])] += f[div[j]]) %= mod;
}
#ifdef DEBUG
cout << i << " : ";
for(auto [x, y] : nf) cout << "[" << x << ": " << y<< "]" << ",";
cout << '\n';
#endif
swap(f, nf);
}
cout << (f[K] - (K == 1) + mod) % mod;
}
};
#else
#include "cassert"
#include "cmath"
#include "cstdint"
#include "cstdio"
#include "cstdlib"
#include "cstring"
#include "algorithm"
#include "bitset"
#include "chrono"
#include "complex"
#include "deque"
#include "functional"
#include "iostream"
#include "limits"
#include "map"
#include "numeric"
#include "queue"
#include "random"
#include "set"
#include "sstream"
#include "string"
#include "unordered_map"
#include "unordered_set"
#include "utility"
#include "vector"
#include "array"
using namespace std;
#define int long long
using ll = long long;
using ull = unsigned long long;
const ll INF = 1ll << 60;
const ll LINF = 0x1fffffffffffffff;
const ll MINF = 0x7fffffffffff;
template <class A, class B> bool chmax(A& l, const B& r){ return r > l ? l = r, 1 : 0; }
template <class A, class B> bool chmin(A& l, const B& r){ return r < l ? l = r, 1 : 0; }
#define sz(x) ssize(x)
#define rep(i, a) for(ll i = 0; i < (a); i ++)
#define Rep(i, a, b) for(ll i = (a); i < (b); i ++)
#define rrep(i, a, b) for(ll i = (b); i --> (a); )
#define all(x) begin(x), end(x)
#define fst first
#define snd second
#define pb push_back
template<class T> using V = vector<T>;
template<class T, std::size_t N> using AR = array<T, N>;
#define MAIN
#include __FILE__
signed main() {ios::sync_with_stdio(0);cin.tie(0);fixed(cout).precision(12);int t = 1;if(__multi__) cin >> t;while(t --) XK::solve();}
#endif