Submission #964467

#	Time	Username	Problem	Language	Result	Execution time	Memory
964467		12345678	Xoractive (IZhO19_xoractive)	C++17	100 / 100	9 ms	856 KiB

Xoractive

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

using namespace std;

int f;
vector<int> qrs[8], ans;
set<int> res[8], s[405];

set<int> getval(vector<int> v)
{
    multiset<int> t, nw;
    set<int> ans;
    if (v.empty()) return ans;
    auto tmp=get_pairwise_xor(v);
    for (auto x:tmp) t.insert(x);
    v.push_back(1);
    tmp=get_pairwise_xor(v);
    for (auto x:tmp) nw.insert(x);
    for (auto x:t) nw.erase(nw.find(x));
    for (auto x:nw) if (x!=0) ans.insert(f^x);
    return ans;
}

void solve(int l, int r, int i, int ly, int isl, int rm)
{
    if (rm)
    {
        s[i]=res[ly];
    }
    else if (isl)
    {
        for (auto x:s[i/2]) if (res[ly].find(x)!=res[ly].end()) s[i].insert(x);
        for (auto x:s[i]) s[i/2].erase(x), res[ly].erase(x);
    }
    else
    {
        s[i]=s[i/2];
    }
    //cout<<"size "<<res[1].size()<<'\n';
    //cout<<"debug "<<l<<' '<<r<<' '<<ly<<' '<<isl<<' '<<rm<<' '<<s[i].size()<<'\n';
    if (l==r)
    {
        if (!s[i].empty()) ans.push_back(*s[i].begin());
        return;
    }
    int md=(l+r)/2;
    solve(l, md, 2*i, ly+1, 1, r==128);
    solve(md+1, r, 2*i+1, ly+1, 0, 0);
}

vector<int> guess(int n) {
	f=ask(1);
    ans.push_back(f);
    for (int i=1; i<=7; i++)
    {
        for (int j=2; j<=128; j++)
        {
            if (j>n) continue;
            if (((j-1)%(1<<(8-i)))<(1<<(7-i))) qrs[i].push_back(j);
        }
        res[i]=getval(qrs[i]);
        //cout<<"res "<<i<<':';
        //for (auto x:res[i]) cout<<x<<' ';
        //cout<<'\n';
    }
    solve(1, 128, 1, 0, 0, 0);
    //cout<<ans.size()<<'\n';
	return ans;
}

• Subtask 1: 6 / 6
• Subtask 2: 94 / 94