#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr)
#define FOR(i, a, b) for(int i = (a); i <= (b); i++)
#define REP(n) FOR(O, 1, (n))
#define pb push_back
#define f first
#define s second
typedef long double ld;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<int, pii> piii;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<ll> vl;
typedef vector<piii> viii;
int find_best(int n) {
int le = 0, ri = n-1;
while (le < ri) {
int mid = (le + ri)/2;
vi a = ask(mid);
if (a[0] + a[1] == 0) return mid;
if (a[0] > 0) ri = mid-1;
else le = mid+1;
//cout << " a: " << a[0] << ", " << a[1] << endl;
//cout << " le = " << le << " ri = " << ri << endl;
}
return le;
}
