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[seunguk] Q03 문제풀이 #162
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[seunguk] Q03 문제풀이 #162
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,53 @@ | ||
package seunguk.thisiscodingtest.part03.Q03_reverse; | ||
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import java.util.Scanner; | ||
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// 11101101 이 있을 때 숫자가 바뀔 때 (1 -> 0, 0 -> 1) 두 가지 경우중 | ||
// 횟수가 더 작은 횟수 출력 | ||
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public class Main { | ||
public static void main(String[] args) { | ||
Scanner sc = new Scanner(System.in); | ||
String exampleString = sc.nextLine(); | ||
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char[] exampleChars = exampleString.toCharArray(); | ||
int oneToZero = 0; // 1이였다가 0으로 바뀐 카운트 | ||
int zeroToOne = 0; // 0이였다가 1로 바뀐 카운트 | ||
boolean check = false; | ||
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// 1 -> 0 바뀌는 카운트 세준다. | ||
for (char exampleChar : exampleChars) { | ||
if (check) { // check가 true이면 1에서 0으로 바뀌었다는 것 | ||
if (exampleChar == '0') { // true일 때 0이면 연속되는 0이므로 카운트를 세지않고 continue | ||
continue; | ||
} else { // 1인경우는 다시 check를 false로 바꿔준다. | ||
check = false; | ||
} | ||
} | ||
if (exampleChar == '0') { // check가 false 이므로 현재 0인 경우는 1 -> 0 으로 바뀐 상태이므로 카운트 증가 | ||
oneToZero++; | ||
check = true; | ||
} | ||
} | ||
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check = false; // check 초기화 | ||
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// 0 -> 1 바뀌는 카운트 세준다. | ||
for (char exampleChar : exampleChars) { | ||
if (check) { | ||
if (exampleChar == '1') { | ||
continue; | ||
} else { | ||
check = false; | ||
} | ||
} | ||
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if (exampleChar == '1') { | ||
zeroToOne++; | ||
check = true; | ||
} | ||
} | ||
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System.out.println(Math.min(oneToZero, zeroToOne)); | ||
} | ||
} |
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boolean 변수를 2개를 둬서 하나의 for문에서 처리가 가능했을거같은데,
for문을 2개로 분리한 이유가 있을까요?!