#include "prize.h"
#include <vector>
using namespace std;
/*
Lemma:
subtask 1 is binary search (eazy peazy lemon squeezy)
*/
int find_best(int n) {
vector<int> res;
res = ask(0);
if(res[0] + res[1] == 0){
return 0;
}
res = ask(n-1);
if(res[0] + res[1] == 0){
return n-1;
}
int l=0, r=n-1, m; // these are definitely outside the thingy majiggy whatever ykwim
while(true){
m = (l+r)/2;
res = ask(m);
if(res[0]+res[1] == 0)return m;
if(res[0])r=m;
else l=m;
}
/*
for(int i = 0; i < n; i++) {
res = ask(i);
if(res[0] + res[1] == 0)
return i;
}
*/
return 0;
}
