Cod sursa(job #2354648)
| Utilizator |  Rus Razvan Constantin Razvan11 |
Data | 25 februarie 2019 14:21:34 |
|---|---|---|---|
| Problema | Factorial | Scor | 0 |
| Compilator | cpp-64 | Status | done |
| Runda | Arhiva de probleme | Marime | 0.29 kb |
#include <fstream>
using namespace std;
ifstream f ("fact.in");
outstream g ("fact.out");
int main(){
int P, N=-1,A,s,p=0;
cin>>P;
N=P*5;
for (int i=25;i<=N;i*=5){
A=N;
N=A-5*(A/i);
N=N+5*(A/i)-5*(N/i);
}
for(int x=5;x<=N;x*=5){
p=p+N/x;
}
if(P==p)
cout<<N;
else
cout<<"-1";
return 0;
}