Submission #1006274

#	Time	Username	Problem	Language	Result	Execution time	Memory
1006274		Almonther	Data Transfer (IOI19_transfer)	C++17	40 / 100	56 ms	2764 KiB

transfer

#include <bits/stdc++.h>
#include "transfer.h"
#define ll long long
#define co cout<<
//#pragma GCC optimize("O3,Ofast,unroll-loops")
//#pragma GCC target("avx2,sse3,sse4,avx")
using namespace std;
//stuff

vector<int>get_attachment(vector<int>source){
	vector<int>arr;
	ll n=source.size();
    ll num=0;
    ll pa=0;
    for(int i=0;i<n;i++){
        if(source[i]) num^=i+1;
        pa^=source[i];
    }
    string s="";
    while(num){
        s+='0'+(num%2);
        num>>=1;
    }
    reverse(s.begin(),s.end());
    while(s.size()<((n==255)?8:6)) s='0'+s;
    for(auto i:s) arr.push_back(i-'0');
    arr.push_back(pa);
    return arr;
}

vector<int>retrieve(vector<int>data){
    vector<int>arr=data;
    ll n=arr.size();
    ll pa,pa1,num;
    pa=0,pa1=0,num=0;
    ll test=arr[n-1];
    ll n1=((n>255)?255:63);
    vector<int>ans;
    for(int i=n1;i<n1+((n>255)?8:6);i++){
        num=num*2+arr[i];
    }
    for(int i=0;i<n1;i++){
        pa^=arr[i];
        if(arr[i]) num^=i+1;
    }
    pa1=pa;
    if(num){
        if(arr[num-1]) pa1=((pa1-1)%2+2)%2;
        else pa1=(pa1+1)%2;
        if(pa1==test){
            for(int i=0;i<n1;i++){
                ans.push_back(arr[i]);
            }
            ans[num-1]^=1;
            return ans;
        }
        else{
            for(int i=0;i<n1;i++){
                ans.push_back(arr[i]);
            }
            return ans;
        }
    }
    else{
        for(int i=0;i<255;i++){
            ans.push_back(arr[i]);
        }
        return ans;
    }
}

• Subtask 1: 0 / 60
• Subtask 2: 40 / 40