Cod sursa(job #149459)
Utilizator | FMI - Petcu Ion Cristian jean | Data | 5 martie 2008 19:03:15 |
---|---|---|---|
Problema | Factorial | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.38 kb |
#include<fstream.h>
#include<math.h>
long n,m=1,i=4,aux,j=1;
int ok=1;
int main()
{
ifstream f("fact.in");
ofstream g("fact.out");
f>>n;
if(n==1) g<<"0";
else
{while(m<n)
{aux=m;
m+=i+j;
i*=5; j++;
}
if(m>n) {i/=5;j-=2;
m=i+pow(5,j)+(n-aux)*5;g<<m;
}
else if(m==n) {i/=5;j--;
m=i*5+pow(5,j); g<<m;}
}
f.close();
g.close();
return 0;
}