Cod sursa(job #1468380)

Utilizator otto1Palaga Vicentiu-Octavian otto1 Data 5 august 2015 22:00:32
Problema Factorial Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.33 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
int p,n,st=1,dr=100000001,mij,r=-1;
ifstream f("fact.in");
ofstream g("fact.out");
int put(int a)
{int nr=0;
while(a)
{nr+=a/5;
a/=5;
}
return nr;
}
int main()
{f>>p;
while(st<dr)
{mij=(st+dr)/2;
n=put(mij);
if(p>n)
st++;
else if(p<n)
dr--;
else
r=n;
}
g<<r;
return 0;
}