Cod sursa(job #1676699)

Utilizator llalexandruLungu Alexandru Ioan llalexandru Data 6 aprilie 2016 09:02:03
Problema Numerele lui Stirling Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.04 kb
#include <fstream>
#define NM 205
#define MOD 98999

using namespace std;

ifstream fin("stirling.in");
ofstream fout("stirling.out");

int M[NM][NM], N[NM][NM];

void Build1()
{
    int i, j;
    M[0][0]=1;
    M[1][1]=1;
    for (i=2; i<NM; i++)
    {
        for (j=1; j<=i; j++)
        {
            M[i][j]=M[i-1][j]*j+M[i-1][j-1];
            M[i][j] %= MOD;
        }
    }
}

void Build2()
{
    int i, j;
    N[0][0]=1;
    N[1][1]=1;
    for (i=2; i<NM; i++)
    {
        for (j=1; j<=i; j++)
        {
            N[i][j]=N[i-1][j]*(i-1)+N[i-1][j-1];
            N[i][j] %= MOD;
        }
    }
}

int main()
{
    int t, c, a, b, i;
    fin>>t;
    Build1();
    Build2();
    for (i=1; i<=t; i++)
    {
        fin>>c>>a>>b;
        if (c==2)
            fout<<M[a][b]<<'\n';
        else
        {
            if ((a-b)%2==1)
            {
                fout<<(-1)*N[a][b]<<'\n';
            }
            else
                fout<<N[a][b]<<'\n';
        }
    }
    return 0;
}