Function main

CPP/questions/reverse.cpp:9–20

#define endl '\n'

int main(){
    cin.tie(0)->sync_with_stdio(0);
    int n;
    cin>>n;
    int ans=0;
    while(n!=0){
        ans=ans*10+(n%10);
        n/=10;
    }
    cout<<ans<<endl;
    return 0;
}