This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "grader.h"
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pb push_back
#define ll long long
#define ld long double
int HC(int n){
int l=1,r=n,ct=0,res=0;
vector<pair<int,int> >a;
while(l<=r){
//printf("%i %i\n",l,r);
if(l==r){res=l;break;}
int mid=l+r>>1;
if(ct%2==0){
a.pb({Guess(mid),mid});
a.pb({Guess(mid+1),mid+1});
if(a.back().fi==-1) r=mid;
else l=mid+1;
}
else{
if(a.back().se<mid){
int k=(r-l)/4;
mid=l+3*k;
a.pb({Guess(mid),mid});
if(a.back().fi==1) l=mid-k;
else r=mid-k;
}
else{
int k=(r-l)/4;
mid=l+k;
a.pb({Guess(mid),mid});
if(a.back().fi==1) r=mid+k;
else l=mid+k;
}
}
ct++;
}
return res;
}
Compilation message (stderr)
hottercolder.cpp: In function 'int HC(int)':
hottercolder.cpp:15:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
15 | int mid=l+r>>1;
| ~^~
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