Aracade Intro #58 messageFromBinaryCode. Algorithm,알고리즘,Codefights,CodeSignal,코드파이트,코드시그널,예제,문제해결능력,example,c++,java,재귀,recursive
Q.
You are taking part in an Escape Room challenge designed specifically for programmers. In your efforts to find a clue, you've found a binary code written on the wall behind a vase, and realized that it must be an encrypted message. After some thought, your first guess is that each consecutive 8 bits of the code stand for the character with the corresponding
extended ASCII code. Assuming that your hunch is correct, decode the message.
너는 프로그래머를 대상으로한 방탈출 챌린지 중이다. 실마리를 찾으려는데, 꽃병 뒤의 벽에서 2진수로 쓰인 것을 찾았고 암호화된 메시지라는 것을 깨달았다. 잠깐 생각 후, 너의 첫번째 추측은 각 8비트 코드가 확장된 ascii 코드와 일치한다는 것이다.
예상이 맞은지 메시지를 디코딩해서 확인해봐라.
e.g.
Input -> code = "010010000110010101101100011011000110111100100001"
Output -> messageFromBinaryCode(code) = "Hello!"
The first 8 characters of the code are 01001000, which is 72 in the binary numeral system. 72 stands for H in the ASCII-table, so the first letter is H.
Other letters can be obtained in the same manner.
첫번째 8자 코드는 01001000 이고 이진수로 72, 아스키 테이블에서 72는 H 이다. 다른 문자들도 같은 방법으로 얻어낸다.
//Process
//1. Input binary code
//2. Iterate from begin to the end
// 2.1. Divide each 8 char
// 2.2. Make decimal number and ascii char
// 2.3. Add to answerString
//3. Return answerString
//4. Finish
//
//1. 바이너리코드를 입력받는다.
//2. 시작부터 끝까지 반복한다.
// 2.1. 8자씩 나눈다.
// 2.2. 8자 ascii 를 10진수로 바꾼다.
// 2.3. answerString에 더한다.
//3. answerString 반환한다.
Code.. Lemme see code!!!!!
코드.. 코드를 보자!!!!!
std::string messageFromBinaryCode(std::string code) {
string message = "";
int asciiNumber = 0;
for (int i = 0; i < code.length(); ++i)
{
if (code[i] == '1')
{
asciiNumber += (int)pow(2, 7-(i%8));
}
if (((i+1)%8 == 1 && i > 0) || i == code.length() - 1)
{
message += (char)asciiNumber;
asciiNumber = 0;
}
}
return message;
}
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