cíu mik với !!!!!!!!c ++

#include <bits/stdc++.h>
using namespace std;
int main()
{
    long long n,tong=0;
    cin>>n;
    for(long long i=1;i<=n;i++)
        {
        tong+=i;

        }
cout<<tong;
}

Code C++ : 

$#doanthevu$

#nocopy

#include<bits/stdc++.h>
#define ll long long
using namespace std;
int main()
{
    ll n,i,tt=0;
    cin>>n;
    for(i=1;i<=n;i++)      
    {
        tt+=i;
    }
    cout<<tt<<endl;
    return 0;
}