#include"prize.h"
#include<bits/stdc++.h>
using namespace std;
vector<vector<int>> memo;
vector<int> K(int i) {
if(memo[i][0] != -1) return memo[i];
return ask(i);
}
int find_best(int N) {
memo.resize(N, {-1, -1});
int i = 0;
int mx = 0;
for(; i < 473; ++i) {
vector<int> e = K(i);
int sum = e[0] + e[1];
if(!sum) return i;
mx = max(mx, e[0] + e[1]);
}
while(true) {
vector<int> e = K(i);
int sum = e[0] + e[1];
if(!sum) return i;
if(sum != mx) { ++i; continue; }
int tl = i + 1, tr = N;
while(tl < tr) {
int tm = (tl + tr) / 2;
vector<int> E = ask(tm);
if(e == E) {
tl = tm + 1;
} else {
tr = tm;
}
}
i = tr;
}
}
