Submission #1088091

#	Time	Username	Problem	Language	Result	Execution time	Memory
1088091		StefanSebez	Hotter Colder (IOI10_hottercolder)	C++14	83.33 / 100	778 ms	24512 KiB

hottercolder

#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){
	//ofstream out("01.out");
	//for(int i=1;i<=500;i++){for(int j=1;j<=i;j++) out<<i<<" "<<j<<endl;}
	int l=1,r=n,ct=0,res=0;
	vector<pair<int,int> >a;
	while(l<=r){
		//printf("%i %i\n",l,r);
		if(r-l==2){
			if(a.size() && a.back().se==r){
				int x=Guess(l);
				if(x==1) res=l;
				else if(x==0) res=l+1;
				else res=r;
			}
			else if(a.size() && a.back().se==l){
				int x=Guess(r);
				if(x==1) res=r;
				else if(x==0) res=l+1;
				else res=l;
			}
			else{
				int x=Guess(l),y=Guess(r);
				if(y==1) res=r;
				else if(y==0) res=l+1;
				else res=l;
			}
			break;
		}
		if(r-l==1){
			if(a.size() && a.back().se==r){
				a.pb({Guess(l),l});
				if(a.back().fi==1) res=l;
				else res=r;
			}
			else if(a.size() && a.back().se==l){
				a.pb({Guess(r),r});
				if(a.back().fi==1) res=r;
				else res=l;
			}
			else{
				int x=Guess(l),y=Guess(r);
				if(y==1) res=r;
				else res=l;
			}
			break;
		}
		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;
			ct=1;
		}
		else{
			if(a.back().se<=mid){
				mid=r;
				//printf("%i\n",mid);
				a.pb({Guess(mid),mid});
				if(a.back().fi==1) l=l+r+1>>1;
				else r=l+r>>1;
			}
			else{
				mid=l;
				//printf("%i\n",mid);
				a.pb({Guess(mid),mid});
				if(a.back().fi==1) r=l+r+1>>1;
				else l=l+r>>1;
			}
			ct=0;
		}
	}
	return res;
}

Compilation message (stderr)

hottercolder.cpp: In function 'int HC(int)':
hottercolder.cpp:30:9: warning: unused variable 'x' [-Wunused-variable]
   30 |     int x=Guess(l),y=Guess(r);
      |         ^
hottercolder.cpp:49:9: warning: unused variable 'x' [-Wunused-variable]
   49 |     int x=Guess(l),y=Guess(r);
      |         ^
hottercolder.cpp:56:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   56 |   int mid=l+r>>1;
      |           ~^~
hottercolder.cpp:69:29: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   69 |     if(a.back().fi==1) l=l+r+1>>1;
      |                          ~~~^~
hottercolder.cpp:70:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   70 |     else r=l+r>>1;
      |            ~^~
hottercolder.cpp:76:29: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   76 |     if(a.back().fi==1) r=l+r+1>>1;
      |                          ~~~^~
hottercolder.cpp:77:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   77 |     else l=l+r>>1;
      |            ~^~

• Subtask 1: 25 / 25
• Subtask 2: 25 / 25
• Subtask 3: 25 / 25
• Subtask 4: 8.333333332499999 / 25