1472 browser_history

class BrowserHistory {
    string base;
    vector<string> all;
    int limit=0;
    int counter=0;
public:

    BrowserHistory(string homepage): all(100) {
        base=homepage;
        all[0]=base;
        
        
        
    }
    
    void visit(string url) {
        all[++counter]=url;
        limit=counter;


        
    }
    
    string back(int steps) {
        counter-=steps;
        if(counter<=0){
            counter=0;
            return base;
        }
        else 
            return all[counter];
        
    }
    
    string forward(int steps) {
        counter+=steps;
        if(counter>limit){
            counter=limit;
            return all[counter];
        }

        else return all[counter];
        
    }
};

/**
 * Your BrowserHistory object will be instantiated and called as such:
 * BrowserHistory* obj = new BrowserHistory(homepage);
 * obj->visit(url);
 * string param_2 = obj->back(steps);
 * string param_3 = obj->forward(steps);
 */