#include <iostream>
#include <cmath>
#include <algorithm>
#pragma GCC optimize("Ofast")
#define ll long long
#define ld long double
using namespace std;
signed main() {
ll n;
cin >> n;
ll sum = 0;
while(n--){
ll x;
cin >> x;
if(x % 7 == 0)
sum += x;
}
cout << sum;
}
