Submission #1012407

#	Time	Username	Problem	Language	Result	Execution time	Memory
1012407		huutuan	Hotter Colder (IOI10_hottercolder)	C++14	79.17 / 100	426 ms	8016 KiB

hottercolder

#include "grader.h"

#include <bits/stdc++.h>

using namespace std;

mt19937 rng(69420);

int HC(int N){
   int l=1, r=N;
   while (l<=r){
      int mid=(l+r)>>1;
      if (l==r) return mid;
      if (r-l+1<=3){
         while (l<=r){
            int mid=(l+r)>>1;
            if (l==r) return mid;
            Guess(l);
            int t=Guess(r);
            if (!t) return mid;
            if (t==1) l=mid+1;
            else r=mid;
         }
         break;
      }
      int m1=(l+r)>>1, m2=(l+r+1)>>1;
      if (m1==m2) --m1, ++m2;
      Guess(m1);
      int t=Guess(m2);
      if (!t) return mid;
      if (t==1){
         l=m2;
         int t=Guess(r);
         mid=(l+r)>>1;
         if (!t) return mid;
         if (t==1) l=mid+1;
         else r=mid;
      }else{
         r=m2;
         int t=-Guess(l);
         mid=(l+r)>>1;
         if (!t) return mid;
         if (t==1) l=mid+1;
         else r=mid;
      }
   }
   return -1;
}

• Subtask 1: 25 / 25
• Subtask 2: 25 / 25
• Subtask 3: 25 / 25
• Subtask 4: 4.1666666674999995 / 25