Submission #1128280

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128280		enzy	Data Transfer (IOI19_transfer)	C++20	0 / 100	460 ms	327680 KiB

transfer

#include "transfer.h"
#include<bits/stdc++.h>
using namespace std;
vector<int> get_attachment(vector<int> source){
	int lim=source.size()+1;
	lim=log2(lim);
	int x=0;
	for(int i=0;i<source.size();i++) if(source[i]==0) x^=(i+1);
	vector<int>aux;
	for(int i=lim-1;i>=0;i++){
	    if(x&(1<<i)) aux.push_back(1);
	    else aux.push_back(0);
	}
	return aux;
}

vector<int> retrieve(vector<int> data){
    int lim=data.size();
    lim=floor(log2(lim));
    int id=data.size();
    int res=0;
    for(int i=0;i<lim;i++){
        id--;
        if(data[i]) res+=(1<<i);
        data.pop_back();
    }
    int atx=0;
    for(int i=0;i<data.size();i++) if(data[i]==0) atx^=(i+1);
    if(atx==res) return data;
    for(int i=0;i<data.size();i++){
        int nx=atx;
        nx^=(i+1);
        if(nx==res){
            data[i]=(data[i]+1)%2;
            return data;
        }
    }
    return data;
}

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