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gwonkim
Study_Algorithm
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h-index.js
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h-index.js
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/*
<문제>
H-Index는 과학자의 생산성과 영향력을 나타내는 지표입니다. 어느 과학자의 H-Index를 나타내는 값인 h를 구하려고 합니다. 위키백과1에 따르면, H-Index는 다음과 같이 구합니다.
어떤 과학자가 발표한 논문 n편 중, h번 이상 인용된 논문이 h편 이상이고 나머지 논문이 h번 이하 인용되었다면 h의 최댓값이 이 과학자의 H-Index입니다.
어떤 과학자가 발표한 논문의 인용 횟수를 담은 배열 citations가 매개변수로 주어질 때, 이 과학자의 H-Index를 return 하도록 solution 함수를 작성해주세요.
<입출력 예시>
citations : [3, 0, 6, 1, 5]
return : 3
--------------------------------
-> 어려운데 간단한 문제
-> forEach와 map은 중간에 멈추지 않음(무조건 한 바퀴, 그래서 while 아니면 for문 사용해야 함)
-> h번 이상 인용 논문이 h번 이상만 생각할 것(h번 이하 인용을 신경 쓸 필요가 없음, 이상이면 넘을 일이 안 생김)
*/
function
solution1
(
citations
)
{
var
answer
=
0
;
citations
=
citations
.
sort
(
(
a
,
b
)
=>
b
-
a
)
;
while
(
answer
+
1
<=
citations
[
answer
]
)
{
answer
++
;
}
return
answer
;
}
// 첫 번째 풀이 축약
function
solution2
(
citations
)
{
var
answer
=
0
;
while
(
answer
+
1
<=
citations
.
sort
(
(
a
,
b
)
=>
b
-
a
)
[
answer
]
)
{
answer
++
;
}
return
answer
;
}
let
a
=
[
3
,
0
,
6
,
1
,
5
]
;
// 3
let
b
=
[
10
,
8
,
5
,
4
,
3
]
;
// 4
console
.
log
(
'solution1 a'
,
solution1
(
a
)
)
;
console
.
log
(
'solution1 b'
,
solution1
(
b
)
)
;
console
.
log
(
'solution2 a'
,
solution2
(
a
)
)
;
console
.
log
(
'solution2 b'
,
solution2
(
b
)
)
;
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