力扣常用c++操作

数字转字符串 to_string()
自定义sort函数

sort(intervals.begin(),intervals.end(),[](vector<int> &v1, vector<int>& v2){
        return v1[0]<v2[0];
        });

自定义二分查找

auto insertit = lower_bound(intervals.begin(),intervals.end(),newInterval[0],[](vector<int> &v1,int val){
            return v1[0]<val;
        });
auto insertit = lower_bound(intervals.begin(),intervals.end(),newInterval[0],greater<int>());

unordered_set

unordered_set<char> windows;
windows.count(s[r-1])==0
windows.insert(s[r-1]);
windows.erase(s[l]);

priority_queue

struct cmp
        {
            bool operator()(ListNode* n1,ListNode* n2){
                return n1->val>n2->val;
            }
        };

priority_queue<ListNode*,deque<ListNode*>,cmp> q;