結果
問題 | No.1011 Infinite Stairs |
ユーザー | rniya |
提出日時 | 2020-03-20 21:39:23 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 4,792 bytes |
コンパイル時間 | 1,948 ms |
コンパイル使用メモリ | 175,032 KB |
実行使用メモリ | 234,224 KB |
最終ジャッジ日時 | 2024-05-08 21:23:02 |
合計ジャッジ時間 | 8,175 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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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 | 8 ms
20,352 KB |
testcase_01 | AC | 8 ms
14,956 KB |
testcase_02 | AC | 32 ms
17,876 KB |
testcase_03 | TLE | - |
testcase_04 | AC | 389 ms
38,784 KB |
testcase_05 | TLE | - |
testcase_06 | -- | - |
testcase_07 | -- | - |
testcase_08 | -- | - |
testcase_09 | -- | - |
testcase_10 | -- | - |
testcase_11 | -- | - |
testcase_12 | -- | - |
testcase_13 | -- | - |
testcase_14 | -- | - |
testcase_15 | -- | - |
testcase_16 | -- | - |
testcase_17 | -- | - |
testcase_18 | -- | - |
testcase_19 | -- | - |
testcase_20 | -- | - |
testcase_21 | -- | - |
testcase_22 | -- | - |
testcase_23 | -- | - |
testcase_24 | -- | - |
testcase_25 | -- | - |
testcase_26 | -- | - |
ソースコード
#include <bits/stdc++.h> using namespace std; typedef long long ll; const ll MOD=1e9+7; template<uint_fast64_t Modulus> class modint{ using u64=uint_fast64_t; public: u64 a; constexpr modint(const u64 x=0) noexcept:a(((x%Modulus)+Modulus)%Modulus){} constexpr u64 &value() noexcept{return a;} constexpr const u64 &value() const noexcept{return a;} constexpr modint &operator+=(const modint &rhs) noexcept{ a+=rhs.a; if (a>=Modulus) a-=Modulus; return *this; } constexpr modint operator+(const modint &rhs) const noexcept{ return modint(*this)+=rhs; } constexpr modint &operator++() noexcept{ return ++a,*this; } constexpr modint operator++(int) noexcept{ modint t=*this; return ++a,t; } constexpr modint &operator-=(const modint &rhs) noexcept{ if (a<rhs.a) a+=Modulus; a-=rhs.a; return *this; } constexpr modint operator-(const modint &rhs) const noexcept{ return modint(*this)-=rhs; } constexpr modint &operator--() noexcept{ return --a,*this; } constexpr modint operator--(int) noexcept{ modint t=*this; return --a,t; } constexpr modint &operator*=(const modint &rhs) noexcept{ a=a*rhs.a%Modulus; return *this; } constexpr modint operator*(const modint &rhs) const noexcept{ return modint(*this)*=rhs; } constexpr modint &operator/=(modint rhs) noexcept{ u64 exp=Modulus-2; while(exp){ if (exp&1) *this*=rhs; rhs*=rhs; exp>>=1; } return *this; } constexpr modint operator/(const modint &rhs) const noexcept{ return modint(*this)/=rhs; } constexpr modint operator-() const noexcept{ return modint(Modulus-a); } constexpr bool operator==(const modint &rhs) const noexcept{ return a==rhs.a; } constexpr bool operator!=(const modint &rhs) const noexcept{ return a!=rhs.a; } constexpr bool operator!() const noexcept{return !a;} friend constexpr modint pow(modint rhs,long long exp) noexcept{ modint res{1}; while(exp){ if (exp&1) res*=rhs; rhs*=rhs; exp>>=1; } return res; } template<class T> friend constexpr modint operator+(T x,modint y) noexcept{ return modint(x)+y; } template<class T> friend constexpr modint operator-(T x,modint y) noexcept{ return modint(x)-y; } template<class T> friend constexpr modint operator*(T x,modint y) noexcept{ return modint(x)*y; } template<class T> friend constexpr modint operator/(T x,modint y) noexcept{ return modint(x)/y; } friend ostream &operator<<(ostream &s,const modint &rhs) noexcept { return s << rhs.a; } friend istream &operator>>(istream &s,modint &rhs) noexcept { u64 a; rhs=modint{(s >> a,a)}; return s; } }; using mint=modint<MOD>; const int MAX=5e5+10; vector<mint> fac(MAX),finv(MAX),inv(MAX); void COMinit(){ fac[0]=fac[1]=1; finv[0]=finv[1]=1; inv[1]=1; for (int i=2;i<MAX;++i){ fac[i]=fac[i-1]*i; inv[i]=-inv[MOD%i]*(MOD/i); finv[i]=finv[i-1]*inv[i]; } } mint COM(int n,int k){ if (n<k||n<0||k<0) return 0; return fac[n]*finv[k]*finv[n-k]; } //Be careful with the value of MAX and conducting COMinit() template<typename Monoid> struct SegmentTree{ typedef function<Monoid(Monoid,Monoid)> F; int n; F f; Monoid id; vector<Monoid> dat; SegmentTree(int n_,F f,Monoid id):f(f),id(id){init(n_);} void init(int n_){ n=1; while(n<n_) n<<=1; dat.assign(n<<1,id); } void build(const vector<Monoid> &v){ for (int i=0;i<v.size();++i) dat[i+n]=v[i]; for (int i=n-1;i;--i) dat[i]=f(dat[i<<1|0],dat[i<<1|1]); } void update(int k,Monoid x){ dat[k+=n]=x; while(k>>=1) dat[k]=f(dat[k<<1|0],dat[k<<1|1]); } Monoid query(int a,int b){ if (a>=b) return id; Monoid vl=id,vr=id; for (int l=a+n,r=b+n;l<r;l>>=1,r>>=1){ if (l&1) vl=f(vl,dat[l++]); if (r&1) vr=f(dat[--r],vr); } return f(vl,vr); } Monoid operator[](int i){ return dat[i+n]; } }; int main(){ cin.tie(0); ios::sync_with_stdio(false); int N,d,K; cin >> N >> d >> K; vector<vector<mint>> dp(N+1,vector<mint>(K+1,0)); dp[0][0]=1; SegmentTree<mint> seg(K+1,[](mint a,mint b){return a+b;},0); seg.update(0,1); for (int i=0;i<N;++i){ for (int j=K;j>=0;--j){ dp[i+1][j]+=seg.query(max(0,j-d),j); seg.update(j,dp[i+1][j]); } } cout << dp[N][K] << '\n'; }