結果
問題 | No.1731 Product of Subsequence |
ユーザー |
![]() |
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 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 13 WA * 18 |
ソースコード
#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;}//*/}