Cod sursa(job #829409)

Utilizator misinozzz zzz misino Data 5 decembrie 2012 12:48:07
Problema 1-sir Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.6 kb
#include<fstream>
#include<cstdlib>
#define MOD 194767
using namespace std;
ifstream f("1-sir.in");
ofstream g("1-sir.out");
int n,i,p,s,j,smax,a[3][50000];
/*int abs(int x)
{
    if(x>0)
    return x;
    return -x;
}*/
int main()
{
    f>>n>>s;
    f.close();
    smax=n*(n-1);
    if(smax<s)
    {
        g<<0<<'\n';
        return 0;
    }
    a[0][0]=1;
    p=1;
    for(i=2;i<=n;p=p^1,++i)
    for(j=0;j<=smax;++j)
    {
        a[p][j]=a[p^1][j+i-1]+a[p^1][abs(j-i+1)];
        if(a[p][j]>=MOD)
        a[p][j]-=MOD;
    }
    g<<a[(n%2)^1][s]<<'\n';
    return 0;
}