#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 55;
int dz[N], aj[N];
bool col[N];
int mx, q;
int as(int a)
{
q++;
if(q == 4500)
{
assert(0);
}
vector <int> fp = ask(a);
if(fp[0] + fp[1] == 0) return 0;
if(!col[a] && fp[0] + fp[1] < mx) return 2;
if(fp[0] - dz[a]) return -1;
return 1;
}
int find_best(int n) {
mx = (n + 1) / 2;
while(true)
{
int l = 0, r = n - 1;
while(l <= r)
{
int mid = (l + r)/2;
int sm = as(mid);
if(sm == 0) return mid;
if(sm == 2)
{
for (int i = mid + 1; i < n; i++)
dz[i]++;
for (int i = mid - 1; i >= 0; i--)
aj[i]++;
col[mid] = true;
break;
}
if(sm == 1) l = mid + 1;
if(sm == -1) r = mid - 1;
}
}
}
