#include<bits/stdc++.h>
#include "grader.h"
using namespace std;
set<int> st;
int HC(int N)
{
if(N==1)
return 1;
if(N==2)
{
Guess(1);
int tmp=Guess(2);
if(tmp==1)
return 2;
return 1;
}
st.clear();
mt19937 gen(2913319);
int bg=1,en=N;
int l=-1;
while(bg<en)
{
//cerr<<bg<<" "<<en<<" "<<l<<"\n";
if(l<bg || en<l)
{
if(uniform_int_distribution<int>{0,1}(gen))
l=bg;
else
l=en;
Guess(l);
}
if(l==bg)
{
int nl=en-max(0,(en-bg)/3-1);
if((nl+l)%2==1 && nl-1>l)
nl--;
int tmp=Guess(nl);
if(tmp==0)
return (nl+l)/2;
else if(tmp==-1)
en=(nl+l-1)/2;
else
bg=(nl+l+2)/2;
l=nl;
}
else if(l==en)
{
int nl=bg+max(0,(en-bg)/3-1);
if((nl+l)%2==1 && nl+1<l)
nl++;
int tmp=Guess(nl);
if(tmp==0)
return (nl+l)/2;
else if(tmp==1)
en=(nl+l-1)/2;
else
bg=(nl+l+2)/2;
l=nl;
}
else if(l-bg>=en-l)
{
int nl=l-1;
int tmp=Guess(nl);
if(tmp==0)
return (nl+l)/2;
else if(tmp==1)
en=nl;
//else if(bg==nl || en-l<=1)
// bg=l;
else
{
bg=nl;
st.insert(nl);
}
l=nl;
}
else
{
int nl=l+1;
int tmp=Guess(nl);
if(tmp==0)
return (nl+l)/2;
else if(tmp==1)
bg=nl;
//else if(bg==nl || en-l<=1)
// bg=l;
else
{
en=nl;
st.insert(nl);
}
l=nl;
}
while(l!=bg && !st.empty() && bg==(*st.begin()))
{
bg++;
st.erase(st.begin());
}
while(l!=en && !st.empty() && en==(*prev(st.end())))
{
en--;
st.erase(prev(st.end()));
}
}
return bg;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
580 ms |
1276 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
578 ms |
1288 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
577 ms |
1288 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Partially correct |
5595 ms |
8480 KB |
Output is partially correct - alpha = 0.666666666667 |