oj.uz

답안 #829573

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
829573 2023-08-18T12:57:45 Z MODDI Data Transfer (IOI19_transfer) C++14
100 / 100
 45 ms 2508 KB 
#include "transfer.h"

std::vector<int> get_attachment(std::vector<int> source) {
	std::vector<int> v;
	int x = 0;
	for (int i = 0; i < source.size(); i++)
		if (source[i]) x ^= (i + 1);

	int last = 0;
	if (source.size() < 64) {
		for (int i = 0; i < 6; i++) {
			v.push_back(x & 1);
			if (x & 1) last = 1 - last;
			x >>= 1;
		}
	} else {
		for (int i = 0; i < 8; i++) {
			v.push_back(x & 1);
			if (x & 1) last = 1 - last;
			x >>= 1;
		}
	}
	v.push_back(last);
	return v;
}

std::vector<int> retrieve(std::vector<int> data) {
	int last = data.back();
	data.pop_back();
	int actual_last = 0, x = 0;
	if (data.size() < 71) {
		for (int i = 0; i < 6; i++) {
			x <<= 1;
			x += data.back();
			if (data.back()) actual_last = 1 - actual_last;
			data.pop_back();
		}
	} else {
		for (int i = 0; i < 8; i++) {
			x <<= 1;
			x += data.back();
			if (data.back()) actual_last = 1 - actual_last;
			data.pop_back();
		}
	}

	if (actual_last != last) return std::vector<int>(data.begin(), data.end());

	int actual_x = 0;
	for (int i = 0; i < data.size(); i++) {
		if (data[i]) actual_x ^= (i + 1);
	}

	int error = actual_x ^ x;
	if (error == 0) return data;

	data[error - 1] = 1 - data[error - 1];
	return data;
}

Compilation message

transfer.cpp: In function 'std::vector<int> get_attachment(std::vector<int>)':
transfer.cpp:6:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |  for (int i = 0; i < source.size(); i++)
      |                  ~~^~~~~~~~~~~~~~~
transfer.cpp: In function 'std::vector<int> retrieve(std::vector<int>)':
transfer.cpp:50:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |  for (int i = 0; i < data.size(); i++) {
      |                  ~~^~~~~~~~~~~~~

Subtask #1
60.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 640 KB Output is correct
2 Correct 2 ms 648 KB Output is correct
3 Correct 1 ms 644 KB Output is correct
4 Correct 1 ms 652 KB Output is correct
5 Correct 2 ms 652 KB Output is correct
6 Correct 2 ms 644 KB Output is correct
7 Correct 2 ms 652 KB Output is correct
8 Correct 1 ms 648 KB Output is correct
9 Correct 2 ms 648 KB Output is correct
10 Correct 2 ms 648 KB Output is correct
11 Correct 1 ms 740 KB Output is correct
12 Correct 1 ms 652 KB Output is correct
13 Correct 1 ms 640 KB Output is correct
14 Correct 2 ms 652 KB Output is correct
15 Correct 2 ms 732 KB Output is correct
16 Correct 2 ms 644 KB Output is correct
17 Correct 1 ms 736 KB Output is correct

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 2492 KB Output is correct
2 Correct 32 ms 2488 KB Output is correct
3 Correct 35 ms 2500 KB Output is correct
4 Correct 35 ms 2500 KB Output is correct
5 Correct 35 ms 2492 KB Output is correct
6 Correct 45 ms 2448 KB Output is correct
7 Correct 34 ms 2496 KB Output is correct
8 Correct 35 ms 2496 KB Output is correct
9 Correct 28 ms 2488 KB Output is correct
10 Correct 27 ms 2488 KB Output is correct
11 Correct 26 ms 2488 KB Output is correct
12 Correct 33 ms 2488 KB Output is correct
13 Correct 32 ms 2488 KB Output is correct
14 Correct 32 ms 2488 KB Output is correct
15 Correct 39 ms 2488 KB Output is correct
16 Correct 34 ms 2488 KB Output is correct
17 Correct 35 ms 2424 KB Output is correct
18 Correct 35 ms 2456 KB Output is correct
19 Correct 34 ms 2508 KB Output is correct