C++ :

#include<iostream>
using namespace std;
int main()
{
	for (int cock=0; cock<=20; cock++)
		for (int hen=0; hen<=33; hen++)
		{
			int chicken=100-cock-hen;
			if (chicken%3==0 && 5*cock+3*hen+chicken/3==100)
				cout<<cock<<" "<<hen<<" "<<chicken<<endl;
		}
	return 0;
}