bài 2
#include<bits/stdc++.h>
using namespace std;
int main()
{
double n;
cin>>n;
if (n==(int)n) {
int z=n;
if (z%2==0)
cout<<z<<" la so chan";
else cout<<z<<" la so le";
}
else cout<<floor(n);
}
bài 3
#include<bits/stdc++.h>
using namespace std;
int main()
{
long long n;
cin>>n;
if (n%2==0)
{
for (int i=0;i<=n;i+=2)
cout<<i<<" ";
}
else {
for (int i=1;i<=n;i+=2)
cout<<i<<" ";
}
}
