func_code_string: #include <bits/stdc++.h>   #define int long long   #define boost ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)      using namespace std;      #define MOD         1000000007   #define nline         n            #define pb          push_back   #define mp          make_pair   #define fi          first   #define se          second   #define yes         cout<< YES n    #define no          cout<< NO n    #define vi          vector<int>   #define pii         pair<int,int>   #define sz(v)       v.size()   #define lcm(a,b)    (a*b)/(__gcd(a,b))   #define deb(x)      cout<<#x<<  =  <<x<<endl;   #define deb2(x,y)   cout<<#x<<  =  <<x<<   <<#y<<  =  <<y<<endl;   #define deb3(x,y,z) cout<<#x<<  =  <<x<<   <<#y<<  =  <<y<<   <<#z<<  =  <<z<<endl;   #define PR(a,n)     cout<<#a<<  =  ;for(int _=0;_<n;_++)cout<<a[_]<<   ;cout<<endl;   #define all(v)      v.begin(),v.end()   #define sortv(v)    sort(all(v));   #define sortrev(v)  sort(all(v),greater<int>())   #define maxHeap     priority_queue<int>   #define minHeap     priority_queue<int, vector<int>, greater<int>>      int pow(int a, int b, int m){       int ans = 1;       while(b){           if (b&1) ans = (ans*a) % m;           b /= 2;           a = (a*a) % m;       }       return ans;   }      int SumOfDigits(int x)   {       if (x < 0)return -1;       int s = 0;       while(x)       {           s += x%10;           x /= 10;       }           return s;   }      //lower_bound = first element >= val, end otherwise   //upper_bound = first element > val, end otherwise   //remember 2 pointer , binary search , bits method   //always look for the edges i.e max value ad min value possible      inline void solve()   {       int k,n,m;       cin>>k>>n>>m;       int a[n],b[m];       int cnt1 = 0,cnt2=0;       vi x,y;       for(int i=0;i<n;i++)       {           cin>>a[i];       }       for(int i=0;i<m;i++)       {           cin>>b[i];       }       vi ans;       int i=0,j=0;       int total = k;       while(1)       {           if(sz(ans)==n+m)           break;           if(a[i]==0 && i<n)           {               ans.pb(0);               total++;               i++;               continue;           }           else if(b[j]==0 && j<m)           {               ans.pb(0);               total++;               j++;               continue;           }           if(( a[i]<b[j] && (i<n && j<m) ) || (i<n && j>=m))           {               if(total>=a[i])               {                   ans.pb(a[i]);                   i++;               }               else                {                   cout<<-1<<nline;                   return;               }           }           else if( (a[i]>=b[j] && (j<m && i<n)) || (j<m && i>=n) )           {               if(total>=b[j])               {                   ans.pb(b[j]);                   j++;               }               else                {                   cout<<-1<<nline;                   return;               }           }       }       if(sz(ans)==n+m)       {           for(auto x:ans)           cout<<x<<   ;           cout<<nline;       }       else        cout<<-1<<nline;          return;   }      signed main()   {       boost;       int t=1;       cin>>t;       for(int tt=1;tt<=t;tt++)       {           // cout<< Case # <<tt<< :  ;           solve();       }       return 0;   }   