leetcode6132. Make all elements in an array equal to zero (simple, weekly)

Idea: Kinds of numbers greater than 0

class Solution {public:int minimumOperations(vector<int>& nums) {int n = nums.size();set<int> st;for (int i = 0; i <n; +i) {if (nums[i]) st.insert(nums[i]);}return st.size();}};