Submission #1074618

#	Time	Username	Problem	Language	Result	Execution time	Memory
1074618		beaconmc	Hotter Colder (IOI10_hottercolder)	C++14	52.78 / 100	2434 ms	8016 KiB

hottercolder

#include "grader.h"
#include <bits/stdc++.h>

typedef long long ll;

#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(lli = x; i>y; i--)
using namespace std;


ll n;
map<ll,ll> sus;
ll cnt = 0;
ll idkman = -1;
int guess(ll a){

   if (a==0) return -1;
   if (a==n+1) return -1;
   cnt++;
   idkman = a;
   return Guess(a);

}
int solve(int a, int b){
   if (a==b) return a;
   
   ll lmao = rand()%2;
   // cout << lmao << endl;
   // cout << a << " " << b << endl;

   
   if (idkman == (a+b)/2  ){
      // cout << "LMAO" << endl;
      ll mid = idkman;
      ll right = guess(idkman+1);
      if (right == -1){
         return solve(a, mid);
      }else{
         return solve(mid+1, b);
      }
   }
   if (idkman == (a+b)/2 + 1){
      ll mid = idkman;
      ll right = guess(idkman+1);
      if (right == -1){
         return solve(a, mid);
      }else{
         return solve(mid+1, b);
      }
   }
   else{

      if (lmao == 0){
         ll mid = (a+b)/2;
         ll midleft = (a+mid)/2;
         ll midright = (b+mid+1)/2;

         ll left, right;
         left = guess(midleft);
         right = guess(midright);
         if (right == 0 ){
            return (midleft+midright)/2;
         }
         else if (right == -1){
            if ((midleft+midright)%2==0) return solve(a, mid-1);
            return solve(a,mid);
         }else{
            return solve(mid+1, b);
         }
      } else{
         ll mid = (a+b)/2;
         ll midleft = (a+mid)/2;
         ll midright = (b+mid+1)/2;

         ll left, right;
         right = guess(midright);
         left = guess(midleft);
         
         if (left == 0 ){
            return (midleft+midright)/2;
         }
         else if (left == -1){
            return solve(mid+1, b);
         }else{
            if ((midleft+midright)%2==0) return solve(a, mid-1);
            return solve(a,mid);
         }
      }


   }
}


int HC(int N){
   idkman = -1;
   srand(time(0));
   sus.clear();
   n = N;
   cnt = 0;
   ll ans = solve(1,N);

   return ans;
}

Compilation message (stderr)

hottercolder.cpp: In function 'int solve(int, int)':
hottercolder.cpp:58:13: warning: variable 'left' set but not used [-Wunused-but-set-variable]
   58 |          ll left, right;
      |             ^~~~
hottercolder.cpp:75:19: warning: variable 'right' set but not used [-Wunused-but-set-variable]
   75 |          ll left, right;
      |                   ^~~~~

• Subtask 1: 25 / 25
• Subtask 2: 25 / 25
• Subtask 3: 0 / 25
• Subtask 4: 2.7777777775000003 / 25