結果
問題 | No.979 Longest Divisor Sequence |
ユーザー | okuraofvegetabl |
提出日時 | 2020-01-31 22:40:07 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 52 ms / 2,000 ms |
コード長 | 6,068 bytes |
コンパイル時間 | 1,693 ms |
コンパイル使用メモリ | 176,572 KB |
実行使用メモリ | 13,716 KB |
最終ジャッジ日時 | 2024-09-17 09:28:39 |
合計ジャッジ時間 | 2,530 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
(要ログイン)
テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 6 ms
12,588 KB |
testcase_01 | AC | 7 ms
12,568 KB |
testcase_02 | AC | 8 ms
12,584 KB |
testcase_03 | AC | 6 ms
12,568 KB |
testcase_04 | AC | 7 ms
12,632 KB |
testcase_05 | AC | 7 ms
12,508 KB |
testcase_06 | AC | 7 ms
12,604 KB |
testcase_07 | AC | 6 ms
12,432 KB |
testcase_08 | AC | 8 ms
12,432 KB |
testcase_09 | AC | 8 ms
12,552 KB |
testcase_10 | AC | 7 ms
12,584 KB |
testcase_11 | AC | 7 ms
12,548 KB |
testcase_12 | AC | 7 ms
12,492 KB |
testcase_13 | AC | 25 ms
13,716 KB |
testcase_14 | AC | 52 ms
13,704 KB |
testcase_15 | AC | 24 ms
12,948 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; typedef pair<int,int> P; typedef long long ll; typedef vector<int> vi; typedef vector<ll> vll; // #define int long long #define pb push_back #define mp make_pair #define eps 1e-9 #define INF 2000000000 //2e9 #define LLINF 1000000000000000ll // 1e15 #define fi first #define sec second #define all(x) (x).begin(),(x).end() #define sq(x) ((x)*(x)) #define dmp(x) cerr << #x << ": " << x << endl; template<class T> void chmin(T& a,const T& b){if(a>b)a=b;} template<class T> void chmax(T& a,const T& b){if(a<b)a=b;} template<class T> using MaxHeap = priority_queue<T>; template<class T> using MinHeap = priority_queue<T,vector<T>,greater<T>>; template<class T> vector<T> vect(int len,T elem){ return vector<T>(len,elem); } template<class T,class U> ostream& operator << (ostream& os,const pair<T,U>& p){ os << p.fi << ',' << p.sec; return os; } template<class T,class U> istream& operator >> (istream& is,pair<T,U>& p){ is >> p.fi >> p.sec; return is; } template<class T> ostream& operator << (ostream &os,const vector<T> &vec){ for(int i=0;i<vec.size();i++){ os << vec[i]; if(i+1<vec.size())os << ' '; } return os; } template<class T> istream& operator >> (istream &is,vector<T>& vec){ for(int i=0;i<vec.size();i++)is >> vec[i]; return is; } void fastio(){ cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(20); } namespace Math{ template<int MOD> // if inv is needed, this shold be prime. struct ModInt{ ll val; ModInt():val(0ll){} ModInt(const ll& v):val(((v%MOD)+MOD)%MOD){} bool operator==(const ModInt& x)const{return val==x.val;} bool operator!=(const ModInt& x)const{return !(*this==x);} bool operator<(const ModInt& x)const{return val<x.val;} bool operator>(const ModInt& x)const{return val>x.val;} bool operator>=(const ModInt& x)const{return !(*this<x);} bool operator<=(const ModInt& x)const{return !(*this>x);} ModInt& operator+=(const ModInt& x){if((val+=x.val)>=MOD)val-=MOD;return *this;} ModInt& operator-=(const ModInt& x){if((val+=MOD-x.val)>=MOD)val-=MOD;return *this;} ModInt& operator*=(const ModInt& x){(val*=x.val)%=MOD;return *this;} ModInt operator+(const ModInt& x)const{return ModInt(*this)+=x;} ModInt operator-(const ModInt& x)const{return ModInt(*this)-=x;} ModInt operator*(const ModInt& x)const{return ModInt(*this)*=x;} friend istream& operator>>(istream&i,ModInt& x){ll v;i>>v;x=v;return i;} friend ostream& operator<<(ostream&o,const ModInt& x){o<<x.val;return o;} }; template<int MOD> ModInt<MOD> pow(ModInt<MOD> a,ll x){ ModInt<MOD> res = ModInt<MOD>(1ll); while(x){ if(x&1)res *= a; x >>= 1; a = a*a; } return res; } constexpr int MOD = 1e9+7; using mint = ModInt<MOD>; vector<mint> inv,fac,facinv; // notice: 0C0 = 1 ModInt<MOD> nCr(int n,int r){ assert(!(n<r)); assert(!(n<0||r<0)); return fac[n]*facinv[r]*facinv[n-r]; } void init(int SIZE){ fac.resize(SIZE+1); inv.resize(SIZE+1); facinv.resize(SIZE+1); fac[0] = inv[1] = facinv[0] = mint(1ll); for(int i=1;i<=SIZE;i++)fac[i]=fac[i-1]*mint(i); for(int i=2;i<=SIZE;i++)inv[i]=mint(0ll)-mint(MOD/i)*inv[MOD%i]; for(int i=1;i<=SIZE;i++)facinv[i]=facinv[i-1]*inv[i]; return; } template<class T> int digit(T x){ int res = 0; while(x){ x /= T(10); res++; } return res; } } namespace DS{ template<class T> struct RangeSum{ vector<T> vec; RangeSum(){} RangeSum(vector<T> elems):vec(elems){ for(int i=1;i<vec.size();i++){ vec[i] += vec[i-1]; } } T sum(int l,int r){ if(l>r)return T(0); if(l==0)return vec[r]; else return vec[r]-vec[l-1]; } }; template<class T> struct BIT{ int N; vector<T> bit; BIT(int N):N(N){ bit = vector<T>(N+1,T(0)); } void add(int i,T x){ i++; while(i<=N){ bit[i]+=x; i+=i&-i; } return; } T sum(int i){ i++; T res = T(0); while(i>0){ res+=bit[i]; i-=i&-i; } return res; } T sum(int l,int r){// [l,r] assert(l<=r); if(l==0)return sum(r); else return sum(r)-sum(l-1); } }; template<class T> struct SlideMin{ vector<T> v; deque<int> deq; SlideMin(vector<T> &v):v(v){} void add(int id){ while(!deq.empty()&&v[deq.back()]>=v[id])deq.pop_back(); deq.push_back(id); } T get(int id){ // [id,added] while(!deq.empty()&&deq.front()<id)deq.pop_front(); assert(!deq.empty()); return v[deq.front()]; } }; template<class T> struct SlideMax{ vector<T> v; deque<int> deq; SlideMax(vector<T> &v):v(v){} void add(int id){ while(!deq.empty()&&v[deq.back()]<=v[id])deq.pop_back(); deq.push_back(id); } T get(int id){ // [id,added] while(!deq.empty()&&deq.front()<id)deq.pop_front(); assert(!deq.empty()); return v[deq.front()]; } }; } namespace Util{ template<class T> vector<pair<T,int>> runLength(vector<T> v){ vector<pair<T,int>> res; for(int i=0;i<v.size();i++){ if(res.empty()||res.back().first!=v[i])res.push_back(make_pair(v[i],1)); else res.back().second++; } return res; } template<class T> void compress(vector<T> &v){ sort(v.begin(),v.end()); v.erase(unique(v.begin(),v.end()),v.end()); } } vector<vector<int>> d(300100); int N; vector<int> a; vector<int> upd; vector<int> dp; signed main(){ fastio(); /* for(int i=1;i<=300000;i++){ for(int j=i*2;j<=300000;j+=i){ d[j].push_back(i); } } */ cin >> N; a.resize(N); cin >> a; dp = vector<int>(300100,1); upd = vector<int>(300100,0); int ans = 0; for(int i=0;i<N;i++){ if(upd[a[i]]<dp[a[i]]){ upd[a[i]]=dp[a[i]]; for(int j = 2*a[i];j<=300000;j+=a[i]){ chmax(dp[j],dp[a[i]]+1); } } chmax(ans,dp[a[i]]); } cout << ans << endl; return 0; }