Cod sursa(job #2285285)

Utilizator SergiuS3003Sergiu Stancu Nicolae SergiuS3003 Data 18 noiembrie 2018 13:35:53
Problema Suma divizorilor Scor 30
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.8 kb
#include <iostream>
#include <fstream>
using namespace std;
  ifstream f("sumdiv.in");
  ofstream g("sumdiv.out");
  const int r=9901;
long long powlog(long long int a,long long int b)
{long long  val=1;
   while(b!=0)
    {if(b%2==0)
    {
      {b/=2;
       a*=a;
       a%=r;
      }
    }
      else
      {b--;
       val*=a;
       val%=r;
      }
    }

    return val;
}
long long int p=0,j;
void desc(long long int n,long long int d)
{ p=0;
  while(n%d==0)
  {n/=d;
   p++;
  }
}
int main()
{
  long long s=1,j,i,a,b;
  f>>a>>b;
  desc(a,2);
  if(p!=0)
  {s=powlog(2,b+1);
   s--;
   s%=r;
  }
  for(i=3;i*i<=a;i+=2)
  {if(a%i==0)
      {desc(a,i);
       s*=powlog(i,b+1);
       s--;
       s/=i-1;
       s%=r;
      }

  }
  g<<s;
    return 0;
}