#include <bits/stdc++.h>
using namespace std;
long long int a, tong, t;
int main() {
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    cin >> a;
    while(a--)
    {
        cin >> t;
         tong += t;
    }
    cout << tong;
    return 0;
}

$#khanhtaon$

$#doanthevu$

Code C++:

#include <bits/stdc++.h>
using namespace std;
int main() {
    ll n;
    cin >> n;
    ll a[n];
    ll sum = 0;
    for (ll i = 0; i < n; i++) 
    {
        cin >> a[i];
        sum += a[i];
    }
    cout << sum << endl;
    return 0;
}

Code Python:

n = int(input())
a = list(map(int, input().split()))
S = sum(a)
print(S)