ai nhanh mik cho 5* + 1 tym + ctlhn

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

$\color{green}{\texttt{C}}\color{lightgreen}{\texttt{+}}\color{lightgreen}{\texttt{+}}$

#include <iostream>

using namespace std;

int main() {

  long long n; cin >> n;
  if (n >= 3) cout << "No";
  else cout << "Yes";
  
}

#include <bits/stdc++.h>
using namespace std;
long long giaithua(long long n)
{
    long long ans=1;
    for (int i=1;i<=n;i++) ans=ans*i;
    return 0;
}
int main()
{
    long long n,ans1=0;
    cin>>n;
    for (int i=1;i<=n;i++) {
        ans1=ans1+giaithua(i);
    }
    if (ans1=giaithua(n+1)) cout<<"YES";
    cout<<"NO";
}

Cre : `color{Cyan}{nguyenanh21811}`