제출 #339595

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
339595		fixikmila	Xoractive (IZhO19_xoractive)	C++14	0 / 100	1 ms	364 KiB

Xoractive

#include <bits/stdc++.h>
#include<interactive.h>
using namespace std;
#define MOD 1000000007
typedef long long ll;
typedef pair<ll,ll>pll;
typedef long double ld;
ll bin_pow(ll a,ll b){
    if(b==0)return 1;
    if(b%2==0){
        ll t=bin_pow(a,b/2);
        return t*t%MOD;
    }
    else return a*bin_pow(a,b-1)%MOD;
}

vector<int> guess(int n){
    vector<int>a(n);
   for(int i=0;i<=n-4;i+=4){
        int x=ask(i+1);
        a[i]=x;
        vector<int>c,y;
        c.push_back(i+1);
        c.push_back(i+2);
        c.push_back(i+3);
        c.push_back(i+4);
        y=get_pairwise_xor(c);
        map<ll,ll>mp;
        for(auto u : y)mp[u]++;
        y.clear();
        mp[0]-=4;
        for(auto u : mp){
            for(int i=0;i<u.second/2;i++)y.push_back(u.first);
        }
        do{
            int m=y.size();
            int b=y[0]^x;
            int c=y[1]^x;
            int d=y[2]^x;
            if((y[3]==(b^c))&&(y[4]==(b^d))&&(y[5]==(c^d))){
                a[i+1]=b;
                a[i+2]=c;
                a[i+3]=d;
                break;
            }
            else continue;
        }while(next_permutation(y.begin(),y.end()));
    }
    if(n%4!=0){
        int x=a[n-n%4-1];
        ll i=n-n%4-1;
        vector<int>c,y;
        c.push_back(i+1);
        c.push_back(i+2);
        if(n%4>=2)c.push_back(i+3);
        if(n%4==3)c.push_back(i+4);
        y=get_pairwise_xor(c);
        map<ll,ll>mp;
        for(auto u : y)mp[u]++;
        y.clear();
        mp[0]-=4;
        for(auto u : mp){
            for(int i=0;i<u.second/2;i++)y.push_back(u.first);
        }
        do{
            int m=y.size();
            int b=y[0]^x,c,d;
            if(n%4>=2) c=y[1]^x;
            if(n%4==3) d=y[2]^x;
            if(((n%4>=2&&y[3]==(b^c))||n%4<2)&&((n%4==3&&y[4]==(b^d))||n%4<3)&&((n%4==3&&y[5]==(c^d))||n%4<3)){
                a[i+1]=b;
                if(n%4>=2)a[i+2]=c;
                if(n%4==3)a[i+3]=d;
                break;
            }
            else continue;
        }while(next_permutation(y.begin(),y.end()));
    }
    return a;
}

컴파일 시 표준 에러 (stderr) 메시지

Xoractive.cpp: In function 'std::vector<int> guess(int)':
Xoractive.cpp:36:17: warning: unused variable 'm' [-Wunused-variable]
   36 |             int m=y.size();
      |                 ^
Xoractive.cpp:66:17: warning: unused variable 'm' [-Wunused-variable]
   66 |             int m=y.size();
      |                 ^

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