help minhf voi. thanks you. làm bfằng C++ nha

#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll a, b, c;
int main()
{ 
 cin >> a >> b >> c;
 cout << __gcd(a , __gcd(b , c));
 return 0;
}

#include <bits/stdc++.h>
using namespace std;
#define int long long 
int gcd(int a,int b){
	return b==0?a:gcd(b,a%b);
}
signed main(){
	int a,b,c;
	cin>>a>>b>>c;
	cout<<gcd(a,gcd(b,c));
}