Submission #471788

#	Time	Username	Problem	Language	Result	Execution time	Memory
471788		nickmet2004	Xoractive (IZhO19_xoractive)	C++11	Compilation error	0 ms	0 KiB

Xoractive

#include<bits/stdc++.h>
#include "interactive.h"
using namespace std;
vector<int> guess(int n){
    if(n <= 14){
        vector<int> h;
        for(int i =1; i<= n; ++i){
            h.emplace_back(ask(i));
        }return h;
    }
    map<int , int> T;
    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.push_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) T[x.first^a] += 1 << i;
    }
    vector<int> ans;
    ans.resize(n);
    ans[0]=a;
    for(auto x : T)ans[x.second]=x.first;
    return ans;
}

Compilation message (stderr)

Xoractive.cpp: In function 'std::vector<int> guess(int)':
Xoractive.cpp:23:48: error: 'a' was not declared in this scope
   23 |         for(auto x : A) if(x.second) T[x.first^a] += 1 << i;
      |                                                ^
Xoractive.cpp:27:12: error: 'a' was not declared in this scope
   27 |     ans[0]=a;
      |            ^