結果
問題 | No.1417 100の倍数かつ正整数(2) |
ユーザー |
![]() |
提出日時 | 2021-03-07 13:58:28 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 17 ms / 3,000 ms |
コード長 | 3,825 bytes |
コンパイル時間 | 2,966 ms |
コンパイル使用メモリ | 208,412 KB |
最終ジャッジ日時 | 2025-01-19 12:36:43 |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 36 |
ソースコード
#include<bits/stdc++.h> using namespace std; #define ALL(x) begin(x),end(x) #define rep(i,n) for(int i=0;i<(n);i++) #define debug(v) cout<<#v<<":";for(auto x:v){cout<<x<<' ';}cout<<endl; #define mod 1000000007 using ll=long long; #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") struct IOSetup{ IOSetup(){ cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(12); } } iosetup; template<typename T> ostream &operator<<(ostream &os,const vector<T>&v){ for(int i=0;i<(int)v.size();i++) os<<v[i]<<(i+1==(int)v.size()?"":" "); return os; } template<typename T> istream &operator>>(istream &is,vector<T>&v){ for(T &x:v)is>>x; return is; } template<ll Mod> struct ModInt{ long long x; ModInt():x(0){} ModInt(long long y):x(y>=0?y%Mod:(Mod-(-y)%Mod)%Mod){} ModInt &operator+=(const ModInt &p){ if((x+=p.x)>=Mod) x-=Mod; return *this; } ModInt &operator-=(const ModInt &p){ if((x+=Mod-p.x)>=Mod)x-=Mod; return *this; } ModInt &operator*=(const ModInt &p){ x=(int)(1ll*x*p.x%Mod); return *this; } ModInt &operator/=(const ModInt &p){ (*this)*=p.inverse(); return *this; } ModInt operator-()const{return ModInt(-x);} ModInt operator+(const ModInt &p)const{return ModInt(*this)+=p;} ModInt operator-(const ModInt &p)const{return ModInt(*this)-=p;} ModInt operator*(const ModInt &p)const{return ModInt(*this)*=p;} ModInt operator/(const ModInt &p)const{return ModInt(*this)/=p;} bool operator==(const ModInt &p)const{return x==p.x;} bool operator!=(const ModInt &p)const{return x!=p.x;} ModInt inverse()const{ int a=x,b=Mod,u=1,v=0,t; while(b>0){ t=a/b; swap(a-=t*b,b);swap(u-=t*v,v); } return ModInt(u); } ModInt pow(long long n)const{ ModInt ret(1),mul(x); while(n>0){ if(n&1) ret*=mul; mul*=mul;n>>=1; } return ret; } friend ostream &operator<<(ostream &os,const ModInt &p){return os<<p.x;} friend istream &operator>>(istream &is,ModInt &a){long long t;is>>t;a=ModInt<Mod>(t);return (is);} static int get_mod(){return Mod;} }; using mint=ModInt<1000000007>; /* 1, 2, 4 5, 10, 20 25, 50, 100 */ string s; int n; const vector<int> to2{1,2,2,4,5,5,7,8,8}; const vector<int> to5{3,4,5,6,7,8,6,7,8}; const vector<int> to4{2,2,2,5,5,5,8,8,8}; signed main(){ cin>>s; n=(int)s.size(); vector<vector<vector<mint>>> dp(n+1,vector<vector<mint>>(2,vector<mint>(9,0))); dp[n][0][0]=1; for(int i=n-1;i>=0;i--){ int dig=s[n-1-i]-'0'; rep(k,9){ dp[i][1][to2[k]]+=dp[i+1][1][k]*2; dp[i][1][to4[k]]+=dp[i+1][1][k]*2; dp[i][1][to5[k]]+=dp[i+1][1][k]; dp[i][1][k]+=dp[i+1][1][k]*(9-5); if(dig==2 or dig==6) dp[i][0][to2[k]]+=dp[i+1][0][k]; else if(dig==4 or dig==8) dp[i][0][to4[k]]+=dp[i+1][0][k]; else if(dig==5) dp[i][0][to5[k]]+=dp[i+1][0][k]; else if(dig!=0) dp[i][0][k]+=dp[i+1][0][k]; if(2<dig) dp[i][1][to2[k]]+=dp[i+1][0][k]; if(4<dig) dp[i][1][to4[k]]+=dp[i+1][0][k]; if(5<dig) dp[i][1][to5[k]]+=dp[i+1][0][k]; if(6<dig) dp[i][1][to2[k]]+=dp[i+1][0][k]; if(8<dig) dp[i][1][to4[k]]+=dp[i+1][0][k]; if(dig<=1) continue; int t=dig-1; if(2<dig) t--; if(4<dig) t--; if(5<dig) t--; if(6<dig) t--; if(8<dig) t--; dp[i][1][k]+=dp[i+1][0][k]*t; } dp[i][1][0]+=1;// leading 0 } cout<<dp[0][0][8]+dp[0][1][8]<<"\n"; return 0; }