Cod sursa(job #2164767)

Utilizator RazvanGutaGuta Razvan Alexandru RazvanGuta Data 13 martie 2018 09:42:20
Problema Numerele lui Stirling Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 0.68 kb
#include<fstream>
#define N 201
using namespace std;
ifstream f("stirling.in");
ofstream g("stirling.out");
int t,n,m,speta,s[201][201],S[201][201];
void precalculare_s()
{
    s[1][1]=1;
    for(int i=2;i<N;++i)
        for(int j=1;j<=i;++j)
            s[i][j]=s[i-1][j-1]-(i-1)*s[i-1][j];
}
void precalculare_S()
{
    S[1][1]=1;
    for(int i=2;i<N;++i)
        for(int j=1;j<=i;++j)
            S[i][j]=S[i-1][j-1]+j*S[i-1][j] ;
}
int main()
{
    precalculare_s();
    precalculare_S();
    f>>t;
    while(t--)
    {
        f>>speta>>n>>m;
        if(speta==1)
        g<<s[n][m]<<'\n';
        if(speta==2)
          g<<S[n][m]<<'\n';
    }
    return 0;
}