Cod sursa(job #2401263)

Utilizator Bodo171Bogdan Pop Bodo171 Data 9 aprilie 2019 16:07:03
Problema Permutari2 Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.26 kb
#include <iostream>
#include <fstream>
using namespace std;
const int nmax=305;
const int mod=10007;
const int mod2=mod*mod;
int fact[nmax],sol[nmax],nem[nmax],zr[nmax],p2[nmax],aux[nmax];
int dp[nmax];
int n,k,i,j,ind;
void prc()
{
    fact[0]=1;
    for(i=1;i<=n;i++)
        fact[i]=(fact[i-1]*i)%mod;
}
void mul(int a[],int b[],int c[])
{
    for(i=0;i<=n;i++)
        for(j=0;j<=n-i;j++)
    {
        c[i+j]+=a[i]*b[j];
        if(c[i+j]>=mod2)
            c[i+j]-=mod2;
    }
    for(i=1;i<=n;i++)
        c[i]%=mod;
}
void memc(int a[],int b[])
{
   for(i=0;i<=n;i++)
        a[i]=b[i];
}
int main()
{
    ifstream f("permutari2.in");
    ofstream g("permutari2.out");
    f>>n>>k;
    prc();
    for(i=1;i<=n;i++)
    {
        nem[i]=fact[i];
        for(j=1;j<i;j++)
        {
            nem[i]=(nem[i]-nem[j]*fact[i-j])%mod2;
            if(nem[i]<0)
                nem[i]+=mod2;
        }
        nem[i]%=mod;
    }
    memc(p2,nem);
    dp[0]=1;
    for(int p=0;p<=8;p++)
    {
        if(((1<<p)&k))
        {
            mul(dp,p2,aux);
            memc(dp,aux);
            memc(aux,zr);
        }
        mul(p2,p2,aux);
        memc(p2,aux);
        memc(aux,zr);
    }
    g<<dp[n];
    return 0;
}