text: #include <bits/stdc++.h>
  using namespace std;
  
  int main() {
      ios::sync_with_stdio(false);
      #ifndef ONLINE_JUDGE
      freopen("files/input.txt", "r", stdin);
      freopen("files/output.txt", "w", stdout);
      #endif
  
      int vladik, valera, turn = 1;
      cin >> vladik >> valera;
  
      string who_lose = "";
      while(true) {
          
          if (turn % 2 == 1) {
              vladik -= turn;
              if (vladik < 0) {
                  who_lose = "Vladik";
                  break;
              }
          }
  
          else {
              valera -= turn;
              if (valera < 0) {
                  who_lose = "Valera";
                  break;
              }
          }
  
          turn++;
      }
  
      cout << who_lose << endl;
      return 0;
  }
  