Cod sursa(job #973280)

Utilizator thewildnathNathan Wildenberg thewildnath Data 13 iulie 2013 21:41:04
Problema 1-sir Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.59 kb
#include<stdio.h>
#include<stdlib.h>
#define MOD 194767

int v[2][65540];

int main()
{
    freopen("1-sir.in","r",stdin);
    freopen("1-sir.out","w",stdout);
    int n,i,j,S,s,l;
    scanf("%d%d",&n,&s);
    S=n*(n-1)/2;
    if(s>S)
    {
        printf("0\n");
        return 0;
    }
    v[1][0]=1;
    l=0;
    for(i=2;i<=n;++i)
    {
        for(j=0;j<=S;++j)
        {
            v[l][j]=v[1-l][j+i-1]+v[1-l][abs(j-i+1)];
            if(v[l][j]>=MOD)
                v[l][j]-=MOD;
        }
        l=1-l;
    }

    printf("%d\n",v[1-l][s]);
    return 0;
}