Giúp tui với huhuhuhu

#danglam228

#include<bits/stdc++.h>
using namespace std;
int a,k;
int main(){
        ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    freopen("exam.inp", "r", stdin);
    freopen("exam.out", "w", stdout);
    cin>>a>>k;
    if(a%2==0 && k%2==0){
        cout<<__gcd(a,k)<<endl;
    }
    else{
        cout<<0<<endl;
    }
}

#include<iostream>
#include<algorithm> 
using namespace std;
int main() {
    freopen("exam.inp", "r", stdin);
    freopen("exam.out", "w", stdout);
    int a,k;
    cin>>a>>k;
    cout<<((a%2==0 && k%2==0)?__gcd(a,k):0)<<endl;
    return 0;
}