1291

class Solution {
public:
    vector<int> sequentialDigits(int low, int high) {
        vector<int>v={1,12,123,1234,12345,123456,1234567,12345678,123456789};
        vector<int>ans;

         for(int i=0;i<v.size();i++){
            ans.push_back(v[i]);
            int p=9-i;
            string e="";
            for(int k=0;k<=i;k++){
                e+="1";
            }
            int l=stoi(e);
            for(int g=1;g<=9-i-1;g++){
            v[i]+=l;
            ans.push_back(v[i]);
           
        }
    }
    for(auto i:ans)
    cout<<i<<" ";

    vector<int>fin;
    for(auto i:ans){
        if(i>=low && i<=high)
        fin.push_back(i);
    }
    return fin;
    }
};