Cod sursa(job #2551282)

Utilizator BAlexandruBorgovan Alexandru BAlexandru Data 19 februarie 2020 18:33:59
Problema Ratphu Scor 40
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.78 kb
#include <fstream>

using namespace std;

ifstream f("ratphu.in");
ofstream g("ratphu.out");

long long n, p;
int k, v[20];
int x[20];
bool u[20];
long long rez;

void bkt(int n)
{
    for (int i=1; i<=k; i++)
        if (!u[i])
        {
            x[n] = i;
            u[i] = 1;

            if (n == k)
            {
                long long nr = 0;
                for (int j=1; j<=n; j++)
                    nr = nr * 10 + v[x[j]];
                if (nr % p == 0)
                    rez++;
            }
            else
                bkt(n+1);

            u[i] = 0;
        }
}

int main()
{
    f >> n >> p;
    while (n)
    {
        k++;
        v[k] = n % 10;
        n /= 10;
    }

    bkt(1);

    g << rez;

    return 0;
}