/** made by amunduzbaev **/
#include <bits/stdc++.h>
//#include "grader.cpp"
using namespace std;
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define fastios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define Pi acos(-1);
#define mod 1e9+7
#define inf 1e18
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<ll> vll;
typedef vector<int> vii;
typedef vector<pll> vpll;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) {return a > b? a = b, true:false;}
template<class T> bool umax(T& a, const T& b) {return a < b? a = b, true:false;}
const int NN = 2e3+5;
#include "prize.h"
int find_best(int n) {
int mx = 0;
for(int i=0;i<n;i++){
vii tmp = ask(i);
// finding answer
mx = max(tmp[0] + tmp[1], mx);
if(tmp[0] + tmp[1] == 0){
return i;
}
if(tmp[0] + tmp[1] != mx) continue;
int l = i, r = n-1;
while(l <= r){
int m = (l + r)>>1;
vii tt = ask(m);
if(tt[0] + tt[1] == 0) return m;
//if(tt[1] == 0) n = m, r = min(r, n-1);
if(tt[0] == 0 || tt == tmp) i = m, l = m+1;
else r = m-1;
}
}
return 0;
}
