Cod sursa(job #1333245)
Utilizator | Data | 2 februarie 2015 22:31:01 | |
---|---|---|---|
Problema | Factorial | Scor | 15 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.54 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fact.in");
ofstream g("fact.out");
int main()
{ unsigned long n,i,c=0,j,c1;
f>>n;
if(n==0) g<<"1";
else
{for(i=2;c<n;i++)
{j=i;
c1=0;
while(j%5==0)
{c1++;
j/=5;
}
c+=c1;
if(c==n)
g<<c;
else if(c>n)
g<<"-1";
}
}
f.close();
g.close();
return 0;
}