Submission #471776

#	Time	Username	Problem	Language	Result	Execution time	Memory
471776		nickmet2004	Xoractive (IZhO19_xoractive)	C++11	94 / 100	5 ms	456 KiB

Xoractive

#include<bits/stdc++.h>
#include "interactive.h"
using namespace std;
vector<int> guess(int n){
    map<int , int> Z;
    if(n<=4){
        vector<int> p;
        p.resize(n);
        for(int i = 1; i<=n;++i){
            p[i] = ask(i);
        }return p;
    }
    int a = ask(1);
    for(int i = 0; i < 7; ++i){
        vector<int> x;
        for(int k = 1; k < n; ++k){
            if(k >> i & 1) x.emplace_back(k + 1);
        }
        vector<int> X = get_pairwise_xor(x);
        x.emplace_back(1);
        vector<int> Y = get_pairwise_xor(x);
        map<int , int> A;
        for(int x : X)A[x]--;
        for(int x : Y)A[x]++;
        for(auto x : A){
            if(x.second&&x.first!=0)Z[x.first^a] += 1<<i;
        }
    }
    vector<int> ans;
    ans.resize(n);
    ans[0] = a;
    for(auto x : Z)ans[x.second]=x.first;
    return ans;
}

• Subtask 1: 0 / 6
• Subtask 2: 94 / 94