Day 2.2

1 files changed, 23 insertions, 8 deletions

diff --git a/Day 2/Day_02.swift b/Day 2/Day_02.swift
index 6d682bd..dc991d6 100644
--- a/Day 2/Day_02.swift
+++ b/Day 2/Day_02.swift
@@ -37,7 +37,7 @@ print("=======Part 1=======\n\(invalidIdSum)")
 
 invalidIdSum = 0
 func isRepeating(_ x: Int) -> Bool {
-  if x == 0 { return false }
+  if x < 10 { return false }
   var digits = 0
   var temp = x
   while temp > 0 {
@@ -48,19 +48,16 @@ func isRepeating(_ x: Int) -> Bool {
   for period in 1...(digits / 2) {
     guard digits % period == 0 else { continue }
     var divisor = 1
-    for _ in 0..<period {
-      divisor *= 10
-    }
+    for _ in 0..<period { divisor *= 10 }
     let pattern = x % divisor
+    guard pattern != 0 else { continue }
     var reconstructed = 0
     var multiplier = 1
     for _ in 0..<(digits / period) {
       reconstructed += pattern * multiplier
       multiplier *= divisor
     }
-    if reconstructed == x {
-      return true
-    }
+    if reconstructed == x { return true }
   }
   return false
 }
@@ -72,4 +69,22 @@ ranges.forEach { range in
     }
   }
 }
-print("=======Part 2=======\n\(invalidIdSum)")
\ No newline at end of file
+print("=======Part 2=======\n\(invalidIdSum)")
+
+invalidIdSum = 0
+ranges.forEach { group in
+  for id in group {
+    let numString = String(id)
+    let numstrLength = numString.count
+    if numstrLength < 2 { continue }
+    for patternLength in 1...(numstrLength / 2) {
+      let remainder = numString.replacingOccurrences(of: numString[..<numString.index(numString.startIndex, offsetBy: patternLength)], with: "")
+      if remainder.isEmpty {
+        invalidIdSum += id
+        break
+      }
+    }
+  }
+}
+
+print("=======Part 2.2=======\n\(invalidIdSum)")
\ No newline at end of file