class Solution {
public:
vector[HTML_REMOVED] findNumsAppearOnce(vector[HTML_REMOVED]& nums) {
int arr[10010];
for(int i = 0;i<10010;i) arr[i] =0;
int len = nums.size();
for(int i = 0;i[HTML_REMOVED] ans;
for(int i = 0;i<10010;i) if(arr[i] == 1) ans.push_back(i);
return ans;
}
};