Cod sursa(job #50045)

Utilizator razvi9Jurca Razvan razvi9 Data 6 aprilie 2007 19:20:44
Problema Suma divizorilor Scor 70
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.83 kb
#include<stdio.h>
#define mod 9901
int a,b,s,c;
int putere(int x,int n)
{if(n==1) return x%mod;
 if(n==0) return 1;
 int p=putere(x,n/2);
 p=(p*p)%mod;
 if(n%2) return (x*p)%mod;
 else return p;}
int div(int a,int b)
{int d=2,s=1;
 long long nr=0;
 while(a%d==0) {a=a/d;nr++;}
 nr=nr*b;
 if(nr) 
 {nr=putere(d,nr+1);
  nr=(mod+nr-1)%mod;
  while(nr%(d-1)) nr=nr+mod;
  nr=nr/(d-1);
  nr%=mod;
  s=(s*nr)%mod;}
 d=3;
 while(a!=1)
 {nr=0;
 while(a%d==0) {a=a/d;nr++;}
 nr=nr*b;
 if(nr) 
 {nr=putere(d,nr+1);
  nr=(mod+nr-1)%mod;
  while(nr%(d-1)) nr=nr+mod;
  nr=nr/(d-1);
  nr%=mod;
  s=(s*nr)%mod;}
  d=d+2;}
return s;}
int main()
{freopen("sumdiv.in","r",stdin);
 freopen("sumdiv.out","w",stdout);
 scanf("%d %d",&a,&b);
 if(a==1||b==0) printf("1");
 else printf("%d",div(a,b));
 fclose(stdout);
 return 0;}