Cod sursa(job #3033075)
Utilizator | Data | 23 martie 2023 12:26:35 | |
---|---|---|---|
Problema | Factorial | Scor | 80 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.42 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream fin("fact.in");
ofstream fout("fact.out");
int p, n;
int main()
{
fin>>n;
if(!n)
{
fout<<1;
return 0;
}
int i;
for(i=5; n; i+=5)
{
p=i;
while(p%5==0 && n)
{
n--;
p/=5;
}
}
i-=5;
if(p%5) fout<<i;
else fout<<-1;
return 0;
}