Cod sursa(job #2002037)

Utilizator Mircea_DonciuDonciu Mircea Mircea_Donciu Data 18 iulie 2017 14:28:00
Problema 1-sir Scor 60
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.68 kb
#include <fstream>

using namespace std;
long long n,s,i,j,t,v[66005],w[66005];
int main()
{
    ifstream f("1-sir.in");
    ofstream g("1-sir.out");
    f>>n>>s;
    if(s<0) s*=-1;
    if(s>(n*(n-1)/2))
    {
        g<<"0\n";
        return 0;
    }
    v[n*(n-1)/2]=1;
    t=194767;
    s+=n*(n-1)/2;
    for(i=1; i<n; i++)
    {
        for(j=n*(n-1)/2-i*(i-1)/2; j<=n*(n-1)/2+i*(i-1)/2; j++)
        {
            w[j+i]+=v[j];
            w[j-i]+=v[j];
        }
        for(j=n*(n-1)/2-i*(i+1)/2; j<=n*(n-1)/2+i*(i+1)/2; j++)
        {
            v[j]=w[j]%t;
            w[j]=0;
        }
    }
    g<<v[s]<<'\n';
    f.close(); g.close();
    return 0;
}