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| // | ||
| // 연속 펄스 부분 수열의 합.swift | ||
| // AlgorithmReview | ||
| // | ||
| // Created by 박소윤 on 2023/10/16. | ||
| // | ||
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| import Foundation | ||
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| func solution(_ sequence:[Int]) -> Int { | ||
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| let first = sequence.first! | ||
| var ans = max(first, -first) | ||
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| func check(_ remain: Int) { | ||
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| var dp = [Int](repeating: 0, count: sequence.count) | ||
| dp[0] = 0 == remain ? -sequence[0] : sequence[0] | ||
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| for idx in (1..<sequence.count) { | ||
| let value = idx % 2 == remain ? -sequence[idx] : sequence[idx] | ||
| dp[idx] = max(dp[idx-1], 0) + value | ||
| ans = max(ans, dp[idx]) | ||
| } | ||
| } | ||
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| check(0) | ||
| check(1) | ||
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| return ans | ||
| } |