結果

問題 No.1731 Product of Subsequence
ユーザー miscalc
提出日時 2021-11-05 21:53:38
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
WA  
実行時間 -
コード長 1,904 bytes
コンパイル時間 2,405 ms
コンパイル使用メモリ 213,224 KB
最終ジャッジ日時 2025-01-25 12:13:24
ジャッジサーバーID
(参考情報)
judge4 / judge1
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ファイルパターン 結果
sample AC * 4
other AC * 13 WA * 18
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ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
#include <atcoder/modint>
using namespace std;
using namespace atcoder;
//using mint = modint998244353;
using mint = modint1000000007;
using ll = long long;
using ld = long double;
using pll = pair<ll, ll>;
using tlll = tuple<ll, ll, ll>;
constexpr ll INF = 1LL << 60;
template<class T> bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}
template<class T> bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}
ll safemod(ll A, ll M) {return (A % M + M) % M;}
ll divfloor(ll A, ll B) {if (B < 0) {return divfloor(-A, -B);} return (A - safemod(A, B)) / B;}
ll divceil(ll A, ll B) {if (B < 0) {return divceil(-A, -B);} return divfloor(A + B - 1, B);}
#define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false)
int main()
{
ll N, K;
cin >> N >> K;
vector<ll> A(N);
for (ll i = 0; i < N; i++)
{
cin >> A.at(i);
}
if (K == 1)
FINALANS((mint(2).pow(N) - 1).val());
vector<ll> D;
for (ll d = 1; d * d <= K; d++)
{
if (K % d == 0)
{
D.push_back(d);
if (d != K / d)
D.push_back(K / d);
}
}
sort(D.begin(), D.end());
ll M = D.size();
map<ll, ll> mp;
for (ll i = 0; i < M; i++)
{
mp[D.at(i)] = i;
//cerr << D.at(i) << endl;
}
vector<vector<mint>> dp(N + 1, vector<mint>(M, 0));
dp.at(0).at(0) = 1;
for (ll i = 0; i < N; i++)
{
for (ll j = 0; j < M; j++)
{
ll d = D.at(j);
ll nd = __gcd(d * A.at(i), K);
ll nj = mp[nd];
dp.at(i + 1).at(nj) += dp.at(i).at(j);
dp.at(i + 1).at(j) += dp.at(i).at(j);
//cerr << j << " " << d << " " << A.at(i) << " " << nd << " " << nj << endl;
}
}
mint ans = dp.at(N).at(M - 1);
cout << ans.val() << endl;
/*
for (ll i = 0; i < N + 1; i++)
{
for (ll j = 0; j < M; j++)
{
cerr << dp.at(i).at(j).val() << " ";
}
cerr << endl;
}
//*/
}
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