Web Browser History - SET, C++ (gcc)

Web Browser History - SET

#include<bits/stdc++.h>
using namespace std;

map<string, int> db;

struct myComp{
	bool operator()(string a, string b) const
	{
		return db[a] > db[b];
	}
};

set<string, myComp> history;
int timeStamp;

// ================================================================
void init()
{
	history.clear();
	db.clear();
	timeStamp = 0;
}

void access(string link)
{
	if(db.find(link)==db.end())
		return;

history.erase(link);
	
	db[link] = timeStamp;
	timeStamp += 1;

history.insert(link);
	//printList();

}

void visit(string link)
{
	if(db.find(link)!=db.end())
	{
		//cout << "VISIT-ACCESS\n";
		access(link);
		return;
	}
	
	db[link] = timeStamp;
	timeStamp += 1;

history.insert(link);
	//printList();
	
	
}

void deleteLink(string link)
{
	if(db.find(link)==db.end())
		return;
	history.erase(link);
	db.erase(link);
	//printList();
}

vector<string> last5()
{
	vector<string> ans;
	for(auto it = history.begin();it != history.end();it++)
	{
		ans.push_back(*it);
		if(ans.size() == 5)
			break;
	}
	return ans;
}


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