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[SeongA] WEEK 14 Solutions #1954

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Oct 28, 2025
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[SeongA] WEEK 14 Solutions #1954

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27 changes: 27 additions & 0 deletions counting-bits/delight010.swift
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Original file line number Diff line number Diff line change
@@ -0,0 +1,27 @@
class Solution {
func countBits(_ n: Int) -> [Int] {
// Time O(n log n)
// Space O(1)
var result: [Int] = []
var count = 0
var num = 0

while num <= n {
var temp = num

while temp != 0 {
if temp & 1 == 1 {
count += 1
}
temp >>= 1
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@rivkode rivkode Oct 25, 2025

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이 temp >>= 1 이 하는 역할이 뭘까요 ? swfit는 처음이라 신기하네요 ㅎㅎ

}

result.append(count)
count = 0
num += 1
}

return result
}
}