Cod sursa(job #1309743)
Utilizator | Data | 5 ianuarie 2015 23:40:03 | |
---|---|---|---|
Problema | Factorial | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.48 kb |
#include <fstream>
#include <limits>
using namespace std;
ifstream f("fact.in");ofstream g("fact.out");
int p,st=1,dr=numeric_limits<int>::max(),mij,nr0;
int main()
{
f>>p;
while(st<=dr)
{
mij=(dr+st)/2;
nr0=0;
for(int i=5;i<=mij;i*=5)
nr0+=mij/i;
if(nr0<p)
st=mij+1;
else if(nr0>=p)
dr=mij-1;
g<<"s";
}
if(nr0==p)
g<<mij;
else g<<"-1";
return 0;
}