Cod sursa(job #30507)

Utilizator razvi9Jurca Razvan razvi9 Data 14 martie 2007 12:49:48
Problema 1-sir Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.4 kb
#include<stdio.h>
int n;
long s,nr;
void sir(int n,long a,long sm)
{if(n==0)
 {if(sm==s) {nr++;nr=nr%194767;}
  return;}
 long sum=n*(n+1)/2+n*a;
 if(sum+sm<s) return;
 sm=sm+a;
 sir(n-1,a+1,sm+1);
 sir(n-1,a-1,sm-1);}
int main()
{freopen("1-sir.in" ,"r", stdin);
 scanf("%d %ld",&n,&s);
 sir(n-1,0,0);
 freopen("1-sir.out" ,"w", stdout);
 printf("%ld",nr);
 fclose(stdout);
 return 0;}