#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 450;
vector<array<int, 3> > results;
int N;
bool cmp(array<int, 3> a, array<int, 3> b)
{
return ((a[0] + a[1]) > (b[0] + b[1]));
}
int DivideAndConquer(int l, int r)
{
// cout << "l = " << l << ", r = " << r << "\n";
if(l > r)
{
return -1;
}
int mid = (l + r) >> 1;
vector<int> reply = ask(mid);
if(reply[0] + reply[1] == 0)
{
// cout << "mid = " << mid << "\n";
return mid;
}
int value1 = -1, value2 = -1;
if(reply[0] != 0)
{
value1 = DivideAndConquer(l, mid - 1);
}
if(reply[1] != 0)
{
value2 = DivideAndConquer(mid + 1, r);
}
if(value1 == -1 && value2 == -1)
{
return -1;
}
if(value1 == -1)
{
return value2;
}
return value1;
}
int find_best(int n)
{
return DivideAndConquer(0, n - 1);
}
