Mai intai trebuie sa te autentifici.
Cod sursa(job #803753)
| Utilizator |  Ava Spataru avaspataru |
Data | 28 octombrie 2012 11:05:30 |
|---|---|---|---|
| Problema | Factorial | Scor | 100 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.36 kb |
#include<stdio.h>
int p;
int zero(int n)
{
int r=0;
while(n>=5)
{r+=n/5;
n/=5;
}
return r;
}
int main()
{long long pas,i,j;
freopen("fact.in","r",stdin);
freopen("fact.out","w",stdout);
scanf("%d",&p);
pas=1<<30;
i=0;
while(pas!=0)
{if(zero(i+pas)<p)
i+=pas;
pas/=2;
}
j=i+1;
if(zero(j)==p)
printf("%d",j);
else
printf("-1");
return 0;
}
