Question: class Solution { public: int majorityElement(vector & nums) { int n = nums.size(); sort(nums.begin(),nums.end()); return nums[n/2]; } }; please explain every line of code elaborately

class Solution { public: int majorityElement(vector& nums) { int n = nums.size(); sort(nums.begin(),nums.end()); return nums[n/2]; } };

please explain every line of code elaborately and which sort used here ? And this code's logic explain please

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