#include "highway.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
template<typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T>
using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T>
using min_heap = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using max_heap = priority_queue<T, vector<T>, less<T>>;
using int64 = long long;
using ld = long double;
constexpr int kInf = 1e9 + 10;
constexpr int64 kInf64 = 1e15 + 10;
constexpr int kMod = 1e9 + 7;
void find_pair(const int n, const vector<int> U, const vector<int> V, const int a, const int b) {
const int m = U.size();
vector<int> W(m);
const int64 init_score = ask(W);
vector<int> deg(n);
for (int i = 0; i < m; i++) {
W[i] = 1;
const int64 score = ask(W);
if (score > init_score) {
deg[U[i]]++;
deg[V[i]]++;
}
W[i] = 0;
}
int s = -1, t = -1;
for (int i = 0; i < n; i++) {
if (deg[i] == 1) {
(s == -1 ? s = i : t = i);
}
}
answer(s, t);
}
