Submission #336439

#	Time	Username	Problem	Language	Result	Execution time	Memory
336439		talant117408	Xoractive (IZhO19_xoractive)	C++17	100 / 100	6 ms	492 KiB

Xoractive

/*
    Code written by Talant I.D.
*/
#include "interactive.h"
//#include "grader.cpp"
#include <bits/stdc++.h>
  
using namespace std;
  
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
  
#define precision(n) fixed << setprecision(n)
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define mp make_pair
#define eps (double)1e-9
#define PI 2*acos(0.0)
#define endl "\n"
#define sz(v) int((v).size())
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define do_not_disturb ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define OK cout << "OK" << endl;
  
inline bool isvowel(char ch){
    ch = tolower(ch);
    return (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u');
}
  
inline bool isprime(int n){
    if(n < 2 || (n%2 == 0 && n != 2)) return false;
    for(int i = 3; i*i <= n; i++)
        if(n%i == 0) return false;
    return true;
}
 
class Union{
    private:
        vector <int> saizu, link;
    public:
        Union(int n){
            saizu.assign(n, 1); link.resize(n); 
            iota(all(link), 0);
        }
        int find(int n){
            if(link[n] == n) return n;
            return link[n] = find(link[n]);
        }
        int same(int a, int b){
            return find(a) == find(b);
        }
        void unite(int a, int b){
            if(same(a, b)) return;
             
            a = find(a); b = find(b);
            if(saizu[a] < saizu[b]) swap(a, b);
             
            saizu[a] += saizu[b];
            link[b] = a;
        }
        int getsize(int a){
            return saizu[find(a)];
        }
};
 
const int mod = 1e9+7;
 
ll mode(ll a){
    a %= mod;
    if(a < 0) a += mod;
    return a;
}
 
ll subt(ll a, ll b){
    return mode(mode(a)-mode(b));
}
 
ll add(ll a, ll b){
    return mode(mode(a)+mode(b));
}
 
ll mult(ll a, ll b){
    return mode(mode(a)*mode(b));
}
 
ll binpow(ll a, ll b){
    ll res = 1;
    while(b){
        if(b&1) res = mult(res, a);
        a = mult(a, a);
        b >>= 1;
    }
    return res;
}

map <int, vector <int>> location;

vector <int> guess(int n){
    vector <int> ans(n);
    ans[0] = ask(1);
    set <int> st;
    
    for(int bit = 0; bit < 7; bit++){
        vector <int> pos;
        for(int i = 1; i < n; i++){
            if(i&(1<<bit)) pos.pb(i+1);
        }
        if(sz(pos)){
            vector <int> tmp1 = get_pairwise_xor(pos);
            pos.pb(1);
            vector <int> tmp2 = get_pairwise_xor(pos);
            vector <int> tmp;
            map <int, int> cnt;
            for(auto to : tmp1) cnt[to]++;
            cnt[0]++;
            for(auto to : tmp2){
                if(!cnt[to]){
                    if(!sz(tmp) || tmp.back() != to)
                    tmp.pb(to);
                }
                else{
                    cnt[to]--;
                }
            }
            for(auto &to : tmp) to ^= ans[0];
            for(auto to : tmp) location[to].pb(bit);
            for(auto to : tmp) st.insert(to);
        }
    }
    
    for(auto to : st) {
        int aa = 0;
        for(auto to2 : location[to]) aa ^= (1<<to2);
        ans[aa] = to;
    }
    return ans;
}
/*

8
3 2 1 4 8 6 7 5

*/

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