t4

class TextEditor {

    string _text;
    int cur;
public:

    TextEditor()  {
        _text = "";
        cur = 0;
    }

    void addText(string text) {
         // printf("add : %s\n", text.data());
        _text.insert(cur,text);
        cur += text.size();
         // cout <<" "<< " text = "<< _text << " cur = " << cur << endl;
    }

    int deleteText(int k) {
         // printf("delete : %d\n", k);
        if(k > cur){
            // printf("case 1\n");
            _text.erase(0, cur);
            // printf("text = %s cur = %d\n", _text.data(), cur);
            k = cur;
            cur = 0;
            return k;
        } else {
            // printf("case 2\n");
            _text.erase(cur - k , k);
            // cout << _text << endl;
            // printf("text = %s", _text.data());
            cur -= k;
            // cout << " delete "<< " text = "<<_text << " cur = " << cur << endl;
            return k;
        }

    }

    string cursorLeft(int k) {
        // printf("left : %d\n", k);
        if(k > cur){
            cur = 0;
            return "";
        } else {
            cur -= k;
            int d = min(10, cur);
            // cout << " "<< " text = "<< _text << " cur = " << cur << endl;
            return _text.substr(cur - d, d);
        }

    }

    string cursorRight(int k) {
         // printf("right : %d\n", k);
        if(cur + k > _text.size()){
            cur = _text.size();
            int d = min(10, cur);
            // printf("text = %s cur = %d\n", _text.data(), cur);
            return _text.substr(cur - d, d);
        } else {
            cur += k;
            int d = min(10, cur);
             // cout << " "<< " text = "<< _text << " cur = " << cur << endl;
            return _text.substr(cur - d, d);
        }

    }
};

/**
 * Your TextEditor object will be instantiated and called as such:
 * TextEditor* obj = new TextEditor();
 * obj->addText(text);
 * int param_2 = obj->deleteText(k);
 * string param_3 = obj->cursorLeft(k);
 * string param_4 = obj->cursorRight(k);
 */