From 4293c978fa03b2acb1561b0e766f85ee3303b526 Mon Sep 17 00:00:00 2001
From: Sang Yu Lee <sangyu857@gmail.com>
Date: Wed, 4 Feb 2026 03:51:08 +0900
Subject: [PATCH] =?UTF-8?q?=EB=B0=A4=20=EC=83=8C=20=EB=82=A0=EB=B3=B4?=
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---
 .../Liv.swift"                                | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 "WEEK03/\355\224\204\353\241\234\352\267\270\353\236\230\353\250\270\354\212\244_\353\260\251\352\270\210\352\267\270\352\263\241/Liv.swift"

diff --git "a/WEEK03/\355\224\204\353\241\234\352\267\270\353\236\230\353\250\270\354\212\244_\353\260\251\352\270\210\352\267\270\352\263\241/Liv.swift" "b/WEEK03/\355\224\204\353\241\234\352\267\270\353\236\230\353\250\270\354\212\244_\353\260\251\352\270\210\352\267\270\352\263\241/Liv.swift"
new file mode 100644
index 0000000..66b4279
--- /dev/null
+++ "b/WEEK03/\355\224\204\353\241\234\352\267\270\353\236\230\353\250\270\354\212\244_\353\260\251\352\270\210\352\267\270\352\263\241/Liv.swift"
@@ -0,0 +1,44 @@
+// 프로그래머스 - 방금그곡
+
+func solution(_ m: String, _ musicinfos: [String]) -> String {
+    var selected: (String, Int) = ("(None)", 0)
+    let heard = convertSheet(m)
+
+    for music in musicinfos {
+        let info = music.split(separator: ",").map { String($0) }
+        guard info.count == 4 else { continue }
+
+        let duration = toNumber(info[1]) - toNumber(info[0])
+        let sheet = convertSheet(info[3])
+        guard !sheet.isEmpty, duration > 0 else { continue }
+
+        let repeatCount = duration / sheet.count + 1
+        let played = String((String(repeating: sheet, count: repeatCount)).prefix(duration))
+
+        if played.contains(heard) && duration > selected.1 {
+            selected = (info[2], duration)
+        }
+    }
+
+    return selected.0
+}
+
+func toNumber(_ str: String) -> Int {
+    let sections = str.split(separator: ":").map { String($0) }
+    guard sections.count == 2,
+        let min = Int(sections[0]),
+        let sec = Int(sections[1])
+    else { return 0 }
+    return min * 60 + sec
+}
+
+func convertSheet(_ str: String) -> String {
+    var sheet: String = str
+    while let point = sheet.firstIndex(of: "#") {
+        let target = sheet.index(before: point)
+        let note = sheet[target].lowercased()
+        sheet.removeSubrange(target...point)
+        sheet.insert(contentsOf: note, at: target)
+    }
+    return sheet
+}