Cod sursa(job #2512696)

Utilizator rebecca0312Andrei Rebecca rebecca0312 Data 21 decembrie 2019 13:39:16
Problema Ratphu Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.66 kb
#include<fstream>
#include<string>
#include<vector>
using namespace std;

string s;
long long best[1<<18][21];

int main(){
    ifstream in("ratphu.in");
    ofstream out("ratphu.out");
    int p;
    in>>s>>p;
    for(size_t i=0;i<s.size();i++){
        s[i]=(s[i]-'0')%p;
        best[1<<i][s[i]]=1;
    }
    for(int i=0;i<(1<<s.size());i++)
        for(int j=0;j<s.size();j++)
           if((i&(1<<j))==0)
            for(int k=0;k<p;k++){
                int nr=k*10+s[j];
                while(nr>=p)
                    nr-=p;
                best[i|(1<<j)][nr]+=best[i][k];
            }
    out<<best[(1<<s.size())-1][0];
    return 0;
}