#include "prize.h"
#include <bits/stdc++.h>
#define MP make_pair
#define fr first
#define sc second
using namespace std;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
const int N = 2e5 + 55;
vector <pair <int, int> > dz;
bool col[N];
int mx, q;
int as(int a)
{
q++;
if(q == 9800)
{
assert(0);
}
vector <int> fp = ask(a);
if(fp[0] + fp[1] == 0) return 0;
if(!col[a] && fp[0] + fp[1] < mx)
{
dz.push_back(MP(a, fp[0] + fp[1]));
return 2;
}
int sm = 0;
for(auto p : dz) if(p.fr < a && p.sc < fp[0] + fp[1]) sm++;
if(fp[0] - sm) return -1;
return 1;
}
int find_best(int n) {
for (int i = 0; i < 200; i++)
{
int i1 = rnd() % n;
vector <int> fp = ask(i1);
mx = max(mx, fp[0] + fp[1]);
}
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)
{
col[mid] = true;
break;
}
if(sm == 1) l = mid + 1;
if(sm == -1) r = mid - 1;
}
}
}
