Submission #1048344

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048344		TahirAliyev	Data Transfer (IOI19_transfer)	C++17	100 / 100	62 ms	2520 KiB

transfer

#include "transfer.h"
#include <bits/stdc++.h>
using namespace std;


vector<int> get_attachment(vector<int> source) {
	int x = 0;
	int n = source.size();
	for(int i = 1; i <= n; i++){
		if(source[i - 1]) x ^= i;
	}
	vector<int> v;
	int l = 0;
	if(n == 63) l = 6;
	else l = 8;
	int xx = 0;
	for(int i = 0; i < l; i++){
		v.push_back(bool(x & (1 << i)));
		xx ^= v[i];
	}
	v.push_back(xx);
	return v;
}

vector<int> retrieve(vector<int> data) {
	int n, l;
	if(data.size() == 63 + 6 + 1) n = 63, l = 6;
	else n = 255, l = 8;
	int x = 0;
	for(int i = 1; i <= n; i++){
		if(data[i - 1]) x ^= i;
	}
	int x1 = 0;
	int bitx = 0;
	for(int i = 0; i < l; i++){
		if(data[n + i]){
			x1 |= (1 << i);
			bitx ^= 1;
		}
	}
	if(bitx == data[n + l]){
		if(x != x1) data[(x ^ x1) - 1] ^= 1;
	}
	vector<int> v;
	for(int i = 0; i < n; i++) v.push_back(data[i]);
	return v;
}

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