easy 
Code

# Code
```cpp []
class Solution {
public:
    bool isPossibleToSplit(vector<int>& nums) {
        
        unordered_map<int,int> map;
        for(int &n:nums)   map[n]++;


        for(auto &p:map){
            if(p.second>2)  return false;
        }

        return true;
    }
};
```
['Array', 'Hash Table', 'Counting', 'C++']