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patch-1
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algorithm
/
algorithm
/
src
/
level1
/
DivisableNumberArray.java
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62 lines (48 loc) · 1.7 KB
patch-1
Breadcrumbs
algorithm
/
algorithm
/
src
/
level1
/
DivisableNumberArray.java
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/*나누어 떨어지는 숫자 배열
문제 설명
array의 각 element 중 divisor로 나누어 떨어지는 값을 오름차순으로 정렬한 배열을 반환하는 함수, solution을 작성해주세요.
divisor로 나누어 떨어지는 element가 하나도 없다면 배열에 -1을 담아 반환하세요.
제한사항
arr은 자연수를 담은 배열입니다.
정수 i, j에 대해 i ≠ j 이면 arr[i] ≠ arr[j] 입니다.
divisor는 자연수입니다.
array는 길이 1 이상인 배열입니다.
입출력 예
arr divisor return
[5, 9, 7, 10] 5 [5, 10]
[2, 36, 1, 3] 1 [1, 2, 3, 36]
[3,2,6] 10 [-1]
입출력 예 설명
입출력 예#1
arr의 원소 중 5로 나누어 떨어지는 원소는 5와 10입니다. 따라서 [5, 10]을 리턴합니다.
입출력 예#2
arr의 모든 원소는 1으로 나누어 떨어집니다. 원소를 오름차순으로 정렬해 [1, 2, 3, 36]을 리턴합니다.
입출력 예#3
3, 2, 6은 10으로 나누어 떨어지지 않습니다. 나누어 떨어지는 원소가 없으므로 [-1]을 리턴합니다.*/
package
level1
;
import
java
.
util
.
ArrayList
;
import
java
.
util
.
Collections
;
import
java
.
util
.
List
;
public
class
DivisableNumberArray
{
public
static
void
main
(
String
[]
args
) {
// TODO Auto-generated method stub
}
public
int
[]
solution
(
int
[]
arr
,
int
divisor
) {
int
[]
answer
= {};
List
<
Integer
>
answerList
=
new
ArrayList
<>();
for
(
int
i
=
0
;
i
<
arr
.
length
;
i
++) {
if
(
arr
[
i
] %
divisor
==
0
) {
answerList
.
add
(
arr
[
i
]);
}
}
if
(
answerList
.
size
() <
1
) {
answer
=
new
int
[
1
];
answer
[
0
] = -
1
;
}
else
{
Collections
.
sort
(
answerList
);
answer
=
answerList
.
stream
().
mapToInt
(
Integer
::
intValue
).
toArray
();
}
return
answer
;
}
}
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