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[week1] 등차수열의 특정한 항만 더하기 #6

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[week1] 등차수열의 특정한 항만 더하기 #6

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15 changes: 15 additions & 0 deletions yerim-son/pg_181931.kt
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// 등차수열의 특정한 항만 더하기

class Solution {
fun solution(a: Int, d: Int, included: BooleanArray): Int {
var answer: Int = 0

for (i in 0 until included.size) {
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@ShinHyeongcheol ShinHyeongcheol Nov 12, 2025

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included의 bool값을 x라고 하고, 인덱스는 그대로 index라고 할게요.
이때 반복문을 저는 for((index, x) in included.withIndex()) 형태로 인덱스와 리스트의 값이 모두 필요할때 사용하는데 좋더라구요.

if (included[i]) {
answer += a + d * i
}
}

return answer
}
}