Submission #829860

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
829860	2023-08-18T15:25:07 Z	vqpahmad	Data Transfer (IOI19_transfer)	C++14	100 / 100	235 ms	2500 KB

transfer

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define F first
#define S second
#define endl '\n'
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
const int mod = 1e9 + 7;
const int N = 1e6 + 15;
const ll inf = 1e18;

#include "transfer.h"

vector<int> get_attachment(vector<int> source) {
	int n = sz(source);
	int B;
	if (n<=63){
		B = 7;
	}
	else B = 9;

	vector<int> a(B);
	for (int i=1;i<=n;i++){
		for (int b=0;b<B-1;b++){
			if ((i>>b)&1) a[b] ^= source[i-1];
		}
	}
	for (int i=0;i<B-1;i++){
		a[B-1] ^= a[i];
	}
	return a;
}

vector<int> retrieve(vector<int> data) {
	int n = sz(data);
	int B;
	if (n<=63+7){
		B = 7;
	}
	else B = 9;
	n -= B;
	int ans = 0;
	bool ok = 1;
	int cur = 0;
	for (int i=n;i<n+B-1;i++){
		cur ^= data[i];
	}
	ok &= data.back()==cur;
	vector<int> c(B-1);
	for (int i=1;i<=n;i++){
		for (int b=0;b<B-1;b++){
			if ((i>>b)&1) c[b] ^= data[i-1];
		}
	}
	for (int i=n;i<n+B-1;i++){
		if (data[i] != c[i-n]) ans |= (1<<(i-n));
	}
	vector<int> fin_ans(n);
	if (ans==0 or !ok){
		for (int i=0;i<n;i++){
			fin_ans[i] = data[i];
		}
	}
	else {
		for (int i=0;i<n;i++){
			if (ans==i+1) fin_ans[i] = 1^data[i];
			else fin_ans[i] = data[i];
		}
	}
	return fin_ans;
}

Subtask #1

60.0 / 60.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	648 KB	Output is correct
2	Correct	6 ms	664 KB	Output is correct
3	Correct	4 ms	652 KB	Output is correct
4	Correct	3 ms	744 KB	Output is correct
5	Correct	4 ms	828 KB	Output is correct
6	Correct	4 ms	644 KB	Output is correct
7	Correct	4 ms	640 KB	Output is correct
8	Correct	6 ms	668 KB	Output is correct
9	Correct	4 ms	644 KB	Output is correct
10	Correct	4 ms	652 KB	Output is correct
11	Correct	5 ms	652 KB	Output is correct
12	Correct	6 ms	644 KB	Output is correct
13	Correct	4 ms	644 KB	Output is correct
14	Correct	4 ms	648 KB	Output is correct
15	Correct	4 ms	644 KB	Output is correct
16	Correct	4 ms	652 KB	Output is correct
17	Correct	4 ms	644 KB	Output is correct

Subtask #2

40.0 / 40.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	205 ms	2492 KB	Output is correct
2	Correct	211 ms	2488 KB	Output is correct
3	Correct	214 ms	2500 KB	Output is correct
4	Correct	204 ms	2452 KB	Output is correct
5	Correct	217 ms	2496 KB	Output is correct
6	Correct	210 ms	2488 KB	Output is correct
7	Correct	216 ms	2456 KB	Output is correct
8	Correct	210 ms	2488 KB	Output is correct
9	Correct	222 ms	2440 KB	Output is correct
10	Correct	213 ms	2444 KB	Output is correct
11	Correct	235 ms	2488 KB	Output is correct
12	Correct	216 ms	2444 KB	Output is correct
13	Correct	217 ms	2496 KB	Output is correct
14	Correct	216 ms	2448 KB	Output is correct
15	Correct	216 ms	2496 KB	Output is correct
16	Correct	209 ms	2452 KB	Output is correct
17	Correct	231 ms	2448 KB	Output is correct
18	Correct	218 ms	2500 KB	Output is correct
19	Correct	214 ms	2448 KB	Output is correct