Cod sursa(job #2776083)
Utilizator | Pierre Alex Pierre | Data | 18 septembrie 2021 16:24:24 |
---|---|---|---|
Problema | Factorial | Scor | 35 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.68 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("fact.in");
ofstream fout("fact.out");
int putere(int n);
int main()
{
int p;
fin >> p;
int n;
if(p == 0)
{
n = -1;
}
else
{
int zerouri = 0, k = 5;
while(zerouri < p)
{
zerouri += putere(k);
k += 5;
}
if(zerouri == p)
{
n = k - 5;
}
else
{
n = -1;
}
}
fout << n;
return 0;
}
int putere(int n)
{
int p = 0;
while(n % 5 == 0)
{
p++;
n /= 5;
}
return p;
}