Cod sursa(job #1173789)

Utilizator alex_HarryBabalau Alexandru alex_Harry Data 20 aprilie 2014 20:58:34
Problema 1-sir Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.66 kb
#include <fstream>
#include <cstring>
#define MOD 194767
using namespace std;
ifstream f("1-sir.in");
ofstream g("1-sir.out");
int N,S;
int DP[2][256*255/2+5];
inline int mod(int x)
{
    return max(x,-x);
}
void Solve_Dinamic()
{
    int i,j,aux=0;
    DP[1][0]=1;
    S=mod(S);
    if(S>N*(N-1)/2)
    {
        g<<0<<"\n";
        return;
    }
    for(i=2;i<=N;i++,aux=1-aux)
    {
        for(j=0;j<=N*(N-1)/2;j++)
        {
            DP[aux][j]=DP[1-aux][j+i-1]+DP[1-aux][mod(j-(i-1))];
            DP[aux][j]%=MOD;
        }
    }

    g<<DP[1-aux][S]<<"\n";
}
int main()
{
    f>>N>>S;
    Solve_Dinamic();
    return 0;
}