oj.uz

답안 #668185

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
668185 2022-12-03T08:19:37 Z Sohsoh84 Flight to the Ford (BOI22_communication) C++17
15 / 100
 43 ms 1808 KB 
#include"communication.h"
//
// --- Sample implementation for the task communication ---
//
// To compile this program with the sample grader, place:
//     communication.h communication_sample.cpp sample_grader.cpp
// in a single folder, then open the terminal in this directory (right-click onto an empty spot in the directory,
// left click on "Open in terminal") and enter e.g.:
//     g++ -std=c++17 communication_sample.cpp sample_grader.cpp
// in this folder. This will create a file a.out in the current directory which you can execute from the terminal
// as ./a.out
// See task statement or sample_grader.cpp for the input specification
//
void encode(int N, int X) {
	if (X == 1) {
		send(0);
		send(0);
		send(0);
		send(0);
	} else if (X == 2) {
		send(0);
		send(1);
		send(1);
		send(0);
	} else {
		send(1);
		send(1);
		send(1);
		send(1);
	}
}

std::pair<int, int> decode(int N) {
	int mask = 0;
	mask |= receive() << 0;
	mask |= receive() << 1;
	mask |= receive() << 2;
	mask |= receive() << 3;

	if (__builtin_popcount(mask) < 2) return {1, 2};
	if (__builtin_popcount(mask) > 2) return {2, 3};
	
	for (int i = 0; i < 3; i++) {
		int cnt = 0;
		if (mask & (1 << i)) cnt++;
		if (mask & (1 << (i + 1))) cnt++;

		if (cnt == 0) return {1, 2};
		if (cnt == 2) return {2, 3};
	}

	return {1, 3};
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 1664 KB Output is correct
2 Correct 10 ms 1668 KB Output is correct
3 Correct 13 ms 1804 KB Output is correct
4 Correct 10 ms 1632 KB Output is correct
5 Correct 13 ms 1796 KB Output is correct
6 Correct 22 ms 1808 KB Output is correct
7 Correct 43 ms 1664 KB Output is correct

Subtask #2
0.0 / 85.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 25 ms 204 KB Not correct
2 Halted 0 ms 0 KB -