Cod sursa(job #920862)
Utilizator | Fratila Florin Ovidiu TheFFO | Data | 20 martie 2013 17:36:43 |
---|---|---|---|
Problema | Factorial | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.45 kb |
#include <iostream>
#include <algorithm>
#include <cstdio>
#include <math.h>
using namespace std;
long long result=25;
int main()
{
freopen("fact.in","r",stdin);
freopen("fact.out","w",stdout);
int p,i;
scanf("%d",&p);
if(!((p/5)%5)&&p>4||p==5)
printf("-1");
else
{
result=5*p;
i=p/5;
if(!(p%5))
i--;
result=i*5;
cout<<result;
}
return 0;
}