Cod sursa(job #1520755)
Utilizator | Data | 9 noiembrie 2015 13:02:09 | |
---|---|---|---|
Problema | Factorial | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.53 kb |
#include <iostream>
#include<fstream>
#include<climits>
using namespace std;
ifstream fin("fact.in");
ofstream fout("fact.out");
int nrz(int x)
{
int p=5,nr=0;
while(p<=x)
{
nr=nr+x/p;
p=p*5;
}
return nr;
}
int main()
{
int n,i,j,z,m,p,ok=0;
cin>>p;
i=1;
j=INT_MAX;
while(i<=j&&!ok)
{
m=(i+j)/2;
z=nrz(m);
if(z==p)ok=1;
else if(z>p)j=m-1;
else i=m+1;
}
if(ok)
while(m%5!=0)m--;
cout<<m;
}