結果
問題 | No.1581 Multiple Sequence |
ユーザー |
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提出日時 | 2021-07-02 22:44:57 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 66 ms / 2,000 ms |
コード長 | 3,760 bytes |
コンパイル時間 | 1,894 ms |
コンパイル使用メモリ | 200,876 KB |
最終ジャッジ日時 | 2025-01-22 16:34:20 |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 21 |
ソースコード
#include <bits/stdc++.h>#define rep(i,n) for(int i=0;i<(int)(n);i++)#define FOR(i,n,m) for(int i=(int)(n); i<=(int)(m); i++)#define RFOR(i,n,m) for(int i=(int)(n); i>=(int)(m); i--)#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)#define RITR(x,c) for(__typeof(c.rbegin()) x=c.rbegin();x!=c.rend();x++)#define setp(n) fixed << setprecision(n)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 (a>b) { a=b; return 1; } return 0; }#define ll long long#define vll vector<ll>#define vi vector<int>#define pll pair<ll,ll>#define pi pair<int,int>#define all(a) (a.begin()),(a.end())#define rall(a) (a.rbegin()),(a.rend())#define fi first#define se second#define pb push_back#define ins insert#define debug(a) cerr<<(a)<<endl#define dbrep(a,n) rep(_i,n) cerr<<(a[_i])<<" "; cerr<<endl#define dbrep2(a,n,m) rep(_i,n){rep(_j,m) cerr<<(a[_i][_j])<<" "; cerr<<endl;}using namespace std;template<class A, class B>ostream &operator<<(ostream &os, const pair<A,B> &p){return os<<"("<<p.fi<<","<<p.se<<")";}template<class A, class B>istream &operator>>(istream &is, pair<A,B> &p){return is>>p.fi>>p.se;}template<class T>vector<T> make_vec(size_t a){return vector<T>(a);}template<class T, class... Ts>auto make_vec(size_t a, Ts... ts){return vector<decltype(make_vec<T>(ts...))>(a, make_vec<T>(ts...));}//-------------------------------------------------//--ModInt//-------------------------------------------------const uint_fast64_t MOD = 1e9+7;class mint{private:using Value = uint_fast64_t;Value n;public:mint():n(0){}mint(int_fast64_t _n):n(_n<0 ? MOD-(-_n)%MOD : _n%MOD){}mint(const mint &m):n(m.n){}friend ostream& operator<<(ostream &os, const mint &a){return os << a.n;}friend istream& operator>>(istream &is, mint &a){Value temp; is>>temp;a = mint(temp);return is;}mint& operator+=(const mint &m){n+=m.n; n=(n<MOD)?n:n-MOD; return *this;}mint& operator-=(const mint &m){n+=MOD-m.n; n=(n<MOD)?n:n-MOD; return *this;}mint& operator*=(const mint &m){n=n*m.n%MOD; return *this;}mint& operator/=(const mint &m){return *this*=m.inv();}mint& operator++(){return *this+=1;}mint& operator--(){return *this-=1;}mint operator+(const mint &m) const {return mint(*this)+=m;}mint operator-(const mint &m) const {return mint(*this)-=m;}mint operator*(const mint &m) const {return mint(*this)*=m;}mint operator/(const mint &m) const {return mint(*this)/=m;}mint operator++(int){mint t(*this); *this+=1; return t;}mint operator--(int){mint t(*this); *this-=1; return t;}bool operator==(const mint &m) const {return n==m.n;}bool operator!=(const mint &m) const {return n!=m.n;}mint operator-() const {return mint(MOD-n);}mint pow(Value b) const {mint ret(1), m(*this);while(b){if (b & 1) ret*=m;m*=m;b>>=1;}return ret;}mint inv() const {return pow(MOD-2);}};//-------------------------------------------------int main(void){cin.tie(0);ios::sync_with_stdio(false);int M; cin>>M;vector<vi> div(M+1);FOR(i,1,M){for(int j=i; j<=M; j+=i){div[j].pb(i);}}vector<mint> dp(M+1);vector<bool> exist(M+1);auto dfs = [&](auto &dfs, int n)->mint{if (exist[n]) return dp[n];if (n==0) return 1;mint ret=0;for(auto d:div[n]){ret += dfs(dfs,d-1);}exist[n] = true;return dp[n] = ret;};cout<<dfs(dfs,M)<<"\n";return 0;}