#include <iostream>
	#include <string>
	#include <set>
 
	struct compare {
	    bool operator() (const std::string& a, const std::string& b) const{
	        return a.size() < b.size();
	    }
	};
 
	template<typename T>
	void print(const T& t){
	    for(auto& it : t)
	        std::cout << it << "\n";
	}
 
	template<typename T>
	void insert(T& t, const char* value)
	{
		auto result = t.insert(value);
		std::cout << "After inserting " << value << ". inserted? " << result.second << "\n";
		print(t);
		std::cout << "\n";
	}
 
	int main() {    
	    std::set<std::string, compare> c;
 
		insert(c, "Apple");
		insert(c, "Lemon");
 
	    print(c);
 
	    return 0;
	}
 

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