Leetcode 1472. 设计浏览器历史记录 (数组模拟）

class BrowserHistory {
private:
    vector<string> urls;
    int cur;
public:
    BrowserHistory(string homepage) {
        cur = 0;
        urls.push_back(homepage);
    }
    
    void visit(string url) {
        urls.erase(urls.begin() + cur + 1, urls.end());
        urls.push_back(url);
        cur++;
    }
    
    string back(int steps) {
        cur = max(0, cur - steps);
        return urls[cur];
    }
    
    string forward(int steps) {
        cur = min(cur + steps, (int)urls.size() - 1);
        return urls[cur];
    }
};

/**
 * 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);
 */

标签：浏览器,string,int,BrowserHistory,1472,steps,urls,Leetcode,cur
来源： https://blog.csdn.net/wwxy1995/article/details/121384663