$\color{#1fdb91}{\texttt{C}}\color{#0aaec9}{\texttt{+}}\color{#e9418e}{\texttt{+}}$

#include <iostream>

#define ll long long
#define N 100005

using namespace std;

int main() {
    
    //freopen("BAI1.INP", "r", stdin);
    //freopen("BAI1.OUT", "w", stdout);
    
    ll n, a[N], s, res=0; cin >> n >> s;
    for (ll i=1; i<=n; ++i) cin >> a[i];
    
    for (ll i=1; i<=n; ++i) {
        if (a[i] % s == 0) res += a[i];
    }
    
    cout << res;
    
}

$\\$
\begin{array}{c|c|c}\color{#ffd710}{\texttt{\{}} \color{#8655d6}{\texttt{\{}}\ \ \color{#8cdcda}{\text{Daoanhviet96}}\ \ \color{#8655d6}{\texttt{\}}} \color{#ffd710}{\texttt{\}}}\end{array}

#include <bits/stdc++.h>
#define ll long long
using namespace std;

int main()
{
    ll n,s,ans=0;
    cin >> n >> s;
    for (int i=0;i<n;i++){
        int res;
        cin >> res;
        if (res%s==0) ans+=res;
    }
    cout << ans;
    return 0;
}