class Solution { public: int removeDuplicates(vector& nums) { int k =1; int j=nums[0]; vector nums2; nums2.push_back(j); for(int i =1;i

class Solution { public: int removeDuplicates(vector& nums) { int n =nums.size(); if(n

class Solution { public: int removeElement(vector& nums, int val) { int k=0; vector index; for(auto iter=nums.begin();iter!=nums.end();iter++) { if(*iter!=val) { index.push_back(*iter); k++; } } nums=index; return k; } };

class Solution { public: void merge(vector& nums1, int m, vector& nums2, int n) { for(int i=m;i