Submission #527858

#	Time	Username	Problem	Language	Result	Execution time	Memory
527858		definitelynotmee	Xoractive (IZhO19_xoractive)	C++17	100 / 100	3 ms	344 KiB

Xoractive

#include<bits/stdc++.h>
#define mp make_pair
#define mt make_tuple
#define all(x) x.begin(), x.end()
#define ff first
#define ss second
using namespace std;
template <typename T>
using matrix = vector<vector<T>>;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const ll INFL = (1LL<<62)-1;
const int INF = (1<<30)-1;
const double EPS = 1e-7;
const int MOD = 1e9 + 7;
const int RANDOM = chrono::high_resolution_clock::now().time_since_epoch().count();
const int MAXN = 1e6+1;
//#include "interactive.h"


int ask(int i);
vector<int> get_pairwise_xor(vector<int> q);
vector<int> guess(int n) {

        int last = ask(n);

        auto getset =[&](vector<int> q)->vector<int>{
          q.push_back(n);
          vector<int> tot = get_pairwise_xor(q);
          q.pop_back();
          vector<int> totminus = get_pairwise_xor(q);

          vector<int> v(q.size());

          int p1 = 0, p2 = 0;
          int ptr = 0;
          while(p1 < tot.size()){
            if(p2 == totminus.size() || totminus[p2] != tot[p1]){
              if(tot[p1] != 0){
                v[ptr] = tot[p1]^last;
                ptr++;
                p1++;
              }

            } else  p2++;
            p1++;
          }

          assert(ptr == q.size());
          return v;
        };

        vector<int> q(n-1);
        iota(all(q),1);

        q.push_back(n);
        matrix<int> group = {q};
        map<int,int> m;
        int timer = 20;
        while(group.size() < n){
          matrix<int> newgroup;
          vector<int> q;
          for(vector<int>& i : group){
            vector<int> g1, g2;
            for(int j = 0; j < i.size()/2; j++)
              q.push_back(i[j]), g1.push_back(i[j]);
            for(int j = i.size()/2; j < i.size(); j++)
              g2.push_back(i[j]);
            if(g1.size())
            newgroup.push_back(g1);
            if(g2.size())
              newgroup.push_back(g2);
          }
          vector<int> r = getset(q);
          for(int i : r)
            m[i] |= (1<<timer);

          swap(group,newgroup);
          timer--;
        }
        vector<int> resp;
        for(pii i : m)
          resp.push_back(i.ff);
        resp.push_back(last);
        sort(all(resp),[&](int a, int b){
          return m[a] > m[b];
        });

        return resp;

}

Compilation message (stderr)

Xoractive.cpp: In lambda function:
Xoractive.cpp:40:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |           while(p1 < tot.size()){
      |                 ~~~^~~~~~~~~~~~
Xoractive.cpp:41:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |             if(p2 == totminus.size() || totminus[p2] != tot[p1]){
      |                ~~~^~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from Xoractive.cpp:1:
Xoractive.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |           assert(ptr == q.size());
      |                  ~~~~^~~~~~~~~~~
Xoractive.cpp: In function 'std::vector<int> guess(int)':
Xoractive.cpp:63:28: warning: comparison of integer expressions of different signedness: 'std::vector<std::vector<int>, std::allocator<std::vector<int> > >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   63 |         while(group.size() < n){
      |               ~~~~~~~~~~~~~^~~
Xoractive.cpp:68:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |             for(int j = 0; j < i.size()/2; j++)
      |                            ~~^~~~~~~~~~~~
Xoractive.cpp:70:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |             for(int j = i.size()/2; j < i.size(); j++)
      |                                     ~~^~~~~~~~~~

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