Submission #681591

#	Time	Username	Problem	Language	Result	Execution time	Memory
681591		Karuk	Xoractive (IZhO19_xoractive)	C++14	100 / 100	5 ms	412 KiB

Xoractive

#include "interactive.h"
#include<bits/stdc++.h>
using namespace std;
vector<int>sub(vector<int>a,vector<int>b) {
    map<int,int>m;
    for(int i:a)m[i]++;
    for(int j:b)m[j]--;
    vector<int>ans;
    for(pair<int,int>p:m) {
        for(int i=0;i<p.second;i++)ans.push_back(p.first);
    }
    return ans;
}
vector<int> guess(int n) {
    map<int,int>m;
    vector<int>nums;
    int x;
    x=ask(1);
    for(int i=6;i>=0;i--) {
        vector<int>askk;
        for(int j=2;j<=n;j++) {
            if(j&(1<<i))askk.push_back(j);
        }
        if(askk.size()==0)continue;
        vector<int>first=get_pairwise_xor(askk);
        askk.push_back(1);
        vector<int>second=get_pairwise_xor(askk);
        second=sub(second,first);
        for(int j=0;j<second.size();j++) {
            second[j]^=x;
            m[second[j]]|=(1<<i);
        }
    }
    int anss[n+1];
    for(pair<int,int>p:m) {
        anss[p.second]=p.first;
    }
    anss[1]=x;
    vector<int>ans(n);
    for(int i=0;i<n;i++)ans[i]=anss[i+1];
    return ans;
}

Compilation message (stderr)

Xoractive.cpp: In function 'std::vector<int> guess(int)':
Xoractive.cpp:29:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         for(int j=0;j<second.size();j++) {
      |                     ~^~~~~~~~~~~~~~

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