Răspuns:
#include <iostream>
#include <fstream>
#include <cmath>
#include <string>
#include <iomanip>
#include <algorithm>
using namespace std;
int main(){
int n,v[1001];
unsigned long long p=1;
cin>>n;
for(int i=1;i<=n;++i)
cin>>v[i];
for(int i=1;i<=n;++i)
if(v[i]%7==0)
p*=v[i];
cout<<p;
return 0;
}
Daca iti trebuie ca vectorul sa memoreze mai multe nr, poti schimba la vector, am pus 1001 doar de proba.
