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algorithm
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algorithm
/
algorithm
/
src
/
level2
/
NumberOfCountry124.java
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master
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algorithm
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algorithm
/
src
/
level2
/
NumberOfCountry124.java
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/*124 나라의 숫자
문제 설명
124 나라가 있습니다. 124 나라에서는 10진법이 아닌 다음과 같은 자신들만의 규칙으로 수를 표현합니다.
124 나라에는 자연수만 존재합니다.
124 나라에는 모든 수를 표현할 때 1, 2, 4만 사용합니다.
예를 들어서 124 나라에서 사용하는 숫자는 다음과 같이 변환됩니다.
10진법 124 나라 10진법 124 나라
1 1 6 14
2 2 7 21
3 4 8 22
4 11 9 24
5 12 10 41
자연수 n이 매개변수로 주어질 때, n을 124 나라에서 사용하는 숫자로 바꾼 값을 return 하도록 solution 함수를 완성해 주세요.
제한사항
n은 500,000,000이하의 자연수 입니다.
입출력 예
n result
1 1
2 2
3 4
4 11*/
package
level2
;
import
java
.
util
.
ArrayList
;
import
java
.
util
.
Collections
;
import
java
.
util
.
List
;
public
class
NumberOfCountry124
{
public
static
void
main
(
String
[]
args
) {
// TODO Auto-generated method stub
NumberOfCountry124
noc
=
new
NumberOfCountry124
();
System
.
out
.
println
(
noc
.
solution
(
18
));
}
public
String
solution
(
int
n
) {
String
answer
=
""
;
List
<
String
>
list
=
new
ArrayList
<>();
while
(
n
>
3
) {
if
(
n
%
3
==
0
) {
list
.
add
(
"4"
);
n
= (
int
)(
n
/
3
) -
1
;
}
else
{
list
.
add
(
n
%
3
+
""
);
n
= (
int
)(
n
/
3
);
}
}
if
(
n
%
3
==
0
) {
list
.
add
(
"4"
);
}
else
{
list
.
add
(
n
%
3
+
""
);
}
Collections
.
reverse
(
list
);
answer
=
String
.
join
(
""
,
list
);
return
answer
;
}
}
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