749A Codeforces - Bachgold Problem
Solution in C++
#include <iostream>
using namespace std;
int n;
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
cin>>n;
if(n%2)
{
cout<<n/2<<"\n";
n=(n-3)/2;
while(n--)cout<<"2 ";
cout<<3;
}
else
{
cout<<n/2<<"\n";
n/=2;
while(n--)cout<<"2 ";
}
return 0;
}
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