#include <bits/stdc++.h>   using namespace std;   int a[2];   string ans[2] = { Vladik ,  Valera };   int main() {     cin >> a[0] >> a[1];     int turn = 0;     int sub = 1;     while (true) {       if (a[turn] - sub >= 0) {         a[turn] -= sub;       } else {         break;       }       sub++;       turn = 1 - turn;     }     cout << ans[turn] << endl;     return 0;   }   