oj.uz

Submission #829854

# Submission time Handle Problem Language Result Execution time Memory
829854 2023-08-18T15:23:43 Z vqpahmad Data Transfer (IOI19_transfer) C++14
40 / 100
 253 ms 2500 KB 
#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)-9;
	int B;
	if (n<=63+7){
		B = 7;
	}
	else B = 9;

	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
0 / 60.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 768 KB WA in grader: wrong source retrieval
2 Halted 0 ms 0 KB -

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 222 ms 2484 KB Output is correct
2 Correct 214 ms 2488 KB Output is correct
3 Correct 235 ms 2496 KB Output is correct
4 Correct 210 ms 2500 KB Output is correct
5 Correct 253 ms 2492 KB Output is correct
6 Correct 242 ms 2448 KB Output is correct
7 Correct 206 ms 2448 KB Output is correct
8 Correct 216 ms 2476 KB Output is correct
9 Correct 226 ms 2496 KB Output is correct
10 Correct 201 ms 2488 KB Output is correct
11 Correct 203 ms 2484 KB Output is correct
12 Correct 210 ms 2492 KB Output is correct
13 Correct 204 ms 2488 KB Output is correct
14 Correct 201 ms 2488 KB Output is correct
15 Correct 216 ms 2492 KB Output is correct
16 Correct 206 ms 2488 KB Output is correct
17 Correct 206 ms 2496 KB Output is correct
18 Correct 204 ms 2488 KB Output is correct
19 Correct 202 ms 2496 KB Output is correct