結果
問題 |
No.917 Make One With GCD
|
ユーザー |
|
提出日時 | 2019-09-09 02:55:30 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
RE
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 2,708 bytes |
コンパイル時間 | 1,920 ms |
コンパイル使用メモリ | 182,544 KB |
実行使用メモリ | 19,072 KB |
最終ジャッジ日時 | 2024-06-28 00:30:43 |
合計ジャッジ時間 | 16,903 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 RE * 1 |
other | AC * 4 WA * 1 RE * 27 |
ソースコード
#include <bits/stdc++.h> using namespace std; constexpr long long MOD = 998244353; //divisor O(sqrt(N)) set<long long> Divisor(long long N) { set<long long> ret; for (long long i = 1; i*i <= N; ++i) { if (N%i == 0) { ret.insert(i); ret.insert(N / i); } } return ret; } //Greatest Common Divisor long long GCD(long long a, long long b) { return ((b == 0) ? a : GCD(b, a % b)); } template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o;} template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;} template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;} template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;} template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;} template <template <class tmp> class T, class U> ostream &operator<<(ostream &o, const T<U> &obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr)o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;} void print(void) {cout << endl;} template <class Head> void print(Head&& head) {cout << head;print();} template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);} int main() { int N,MAX_A = 2000; cin >> N; vector<int> A(N),table(MAX_A+1,0); for(int i = 0; i < N; ++i) cin >> A[i]; vector<vector<int>> gcd(MAX_A+1,vector<int>(MAX_A+1,0)); // O(MAX_A*MAX_A*log(MAX_A)) for(int i = 1; i <= MAX_A; ++i) for(int j = i; j <= MAX_A; ++j) gcd[i][j] = gcd[j][i] = GCD(i,j); long long ans = 0; // O(N*N*N*M+N*M*logM) for(int i = 0; i < N; ++i) { auto d = Divisor(A[i]); int M = d.size(),idx = 0; vector<int> val; // O(M*logM) for(auto& e:d) { table[e] = idx++; val.push_back(e); } vector<vector<long long>> dp(N, vector<long long>(M,0)); dp[i][table[A[i]]] = 1; // O(N*N*M) for(int j = i; j < N; ++j) { for(int k = j + 1; k < N; ++k){ for(int l = 0; l < M; ++l){ (dp[k][table[gcd[val[l]][A[k]]]] += dp[j][l]) %= MOD; } } ans += dp[j][table[1]]; } } cout << ans << endl; return 0; }