https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/?envType=study-plan-v2&envId=top-interview-150 class Solution { public: static const bool cmp (vector<int> &a, vector<

https://leetcode.com/problems/merge-intervals/description/?envType=study-plan-v2&envId=top-interview-150 class Solution { public: vector<vector<int>> merge(vector<vector&

https://leetcode.com/problems/summary-ranges/description/?envType=study-plan-v2&envId=top-interview-150 class Solution { public: vector<string> summaryRanges(vector<int>& nums)

https://leetcode.com/problems/longest-consecutive-sequence/description/?envType=study-plan-v2&envId=top-interview-150 class Solution { public: int longestConsecutive(vector<int>& nums) { int ans = 0;

https://leetcode.com/problems/happy-number/description/?envType=study-plan-v2&envId=top-interview-150 class Solution { public: int getNext(int n) { int res = 0; string str = to_string(