C++ :

#include<iostream>
using namespace std;
int main()
{
	for(int a=0;a<=(500/15);++a)
	{	for(int b=0;b<=50;++b)
			for(int c=0;c<=100;++c)
				if((a+b+c==90)&&(15*a+10*b+5*c==500))
				{	cout<<a;
					cout<<" "<<b<<" "<<c<<endl;
				}
	}
			return 0;
}