diff --git a/AdventOfCode2022.xcodeproj/project.pbxproj b/AdventOfCode2022.xcodeproj/project.pbxproj
index 426201a..8f2ebef 100644
--- a/AdventOfCode2022.xcodeproj/project.pbxproj
+++ b/AdventOfCode2022.xcodeproj/project.pbxproj
@@ -14,6 +14,7 @@
 		4663CA3029424CD30086DF24 /* Day8.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4663CA2F29424CD30086DF24 /* Day8.swift */; };
 		46C166D12947245200A88A2B /* Day11.swift in Sources */ = {isa = PBXBuildFile; fileRef = 46C166D02947245200A88A2B /* Day11.swift */; };
 		46C166D72947A34C00A88A2B /* Day12.swift in Sources */ = {isa = PBXBuildFile; fileRef = 46C166D62947A34C00A88A2B /* Day12.swift */; };
+		46C166DA294870AA00A88A2B /* Day13.swift in Sources */ = {isa = PBXBuildFile; fileRef = 46C166D9294870AA00A88A2B /* Day13.swift */; };
 		46CFCF1C29407A610017442D /* Day6.swift in Sources */ = {isa = PBXBuildFile; fileRef = 46CFCF1B29407A610017442D /* Day6.swift */; };
 		46CFCF1E294080D80017442D /* Day7.swift in Sources */ = {isa = PBXBuildFile; fileRef = 46CFCF1D294080D80017442D /* Day7.swift */; };
 		46D5FD8729439AFB009DE94F /* Day9.swift in Sources */ = {isa = PBXBuildFile; fileRef = 46D5FD8629439AFB009DE94F /* Day9.swift */; };
@@ -50,6 +51,8 @@
 		46C166D02947245200A88A2B /* Day11.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Day11.swift; sourceTree = "<group>"; };
 		46C166D62947A34C00A88A2B /* Day12.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Day12.swift; sourceTree = "<group>"; };
 		46C166D82947A35B00A88A2B /* day_12.txt */ = {isa = PBXFileReference; lastKnownFileType = text; path = day_12.txt; sourceTree = "<group>"; };
+		46C166D9294870AA00A88A2B /* Day13.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Day13.swift; sourceTree = "<group>"; };
+		46C166DB294870B700A88A2B /* day_13.txt */ = {isa = PBXFileReference; lastKnownFileType = text; path = day_13.txt; sourceTree = "<group>"; };
 		46CFCF1A29407A520017442D /* day_6.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = day_6.txt; sourceTree = "<group>"; };
 		46CFCF1B29407A610017442D /* Day6.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Day6.swift; sourceTree = "<group>"; };
 		46CFCF1D294080D80017442D /* Day7.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Day7.swift; sourceTree = "<group>"; };
@@ -118,6 +121,7 @@
 				46D5FD8B2944AB7F009DE94F /* day_10.txt */,
 				46C166CF2947243A00A88A2B /* day_11.txt */,
 				46C166D82947A35B00A88A2B /* day_12.txt */,
+				46C166DB294870B700A88A2B /* day_13.txt */,
 			);
 			path = Input;
 			sourceTree = "<group>";
@@ -137,6 +141,7 @@
 				46D5FD892944AB6F009DE94F /* Day10.swift */,
 				46C166D02947245200A88A2B /* Day11.swift */,
 				46C166D62947A34C00A88A2B /* Day12.swift */,
+				46C166D9294870AA00A88A2B /* Day13.swift */,
 			);
 			path = Solutions;
 			sourceTree = "<group>";
@@ -210,6 +215,7 @@
 				46E15EAB293E0BFD00F44580 /* Day4.swift in Sources */,
 				46D5FD8A2944AB6F009DE94F /* Day10.swift in Sources */,
 				46E15EA9293DE04900F44580 /* Day3.swift in Sources */,
+				46C166DA294870AA00A88A2B /* Day13.swift in Sources */,
 				46D5FD8729439AFB009DE94F /* Day9.swift in Sources */,
 				464561562939F2E900BB9874 /* Day2.swift in Sources */,
 				464561542939F19A00BB9874 /* InputLoader.swift in Sources */,
diff --git a/AdventOfCode2022/Input/day_13.txt b/AdventOfCode2022/Input/day_13.txt
new file mode 100644
index 0000000..fe5b527
--- /dev/null
+++ b/AdventOfCode2022/Input/day_13.txt
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+
+[[10,0,[1,7,0,[5,8,3,4]]],[[3,3,[10,10],[4,2,10,9],[]],[6,9,3],[3],[[10],[0,4],6,[4,2,9,6],10]]]
+[[4,[[],[3,2],[6],10],[8,[10,4,9],5,[10],[7]],4,[4,[],9]],[[5,[5,3,8,0,9],[1,5,1,2,8],[1,0]]],[],[5,4,[[5,4,5],[1,9,10,10]],[]]]
+
+[[[6,[9,5,0,7,9],[3,6,7,7,3],6,[5,8,5,8]],5,6,10,[[9,1,6,1],[2,0,9,2,3],8,5,[4]]],[2,[[1],2,0,[7,4,9,9,9]],[5,2,0]],[[[],[4,7,1,7,3],1,10]],[[4,[9,4,3,8,5],2],2,1,4],[7,7,5,8]]
+[[10,1,6],[0]]
+
+[[[9,9,0,[9,5]],2,10],[],[0]]
+[[[7,5,10,5],1,[[7],6,10,0],[[8,8],[3,6,10,9],[10,4,7],0]],[2],[[5],[[1]],8,5,[10]]]
+
+[[[[1,2,9,8],8,[6],2],3]]
+[[[[7,9],[2,4,1,7,2],[]]],[[10,7]]]
+
+[[3,2],[[[9,0,3],[3,8,10],[10,0,6,0],2],[],[1],6,[[9,0,8,8,6],8]],[3,1,[9,6],[]],[7,9],[3,[[7,8],3],10,[[5,7,5,3],5,[8,8,1,0]]]]
+[[5,[2,[6,6,8,6],[1,2,7],[10,9],[3,9,4]],[[1,10],[4,6,3],9],[9,1,1,6],[[1,5,4,7,9],1,[]]],[[6,8,9],9,[[4,8,8,3,8],3]],[2,[3,9,[1,9]],5,6]]
+
+[[8,6,10,[1]]]
+[[3,8,[[],[],10,[4]],3,5],[0],[3,[0,[8],[2,7,6,4],[7,6,7],[0,7,10,1]],[4,8,[4,0,9,7]],7,[8,[1,2,7,7,4]]],[[[2,1,9,0],[],10,[9,5,1]],[[],[0],[10]]],[1,9]]
+
+[[[7,[8]],[4],[2,[],[7,7],9],7],[[],[[6],[2,6,1]],2,5]]
+[[],[],[[5,0,2],[1],2,[8,9,[6,6]],[8]]]
+
+[[7,9,4,10,6],[[1,[4,7,8,5,6],[9]],[8,2,3,9,1],4,1]]
+[[[9,[2,4,10,7],7],[6,[3,4,10,9,3],[]],[9,[1,7,8,6],[8],2],9,[]],[[],9,4],[[[5,4,4,5],2,[1,7,9],6]],[2,3,6]]
+
+[[],[[[1,2,8],3],0],[[0],[[],5,[7,6,6,1,9]],8]]
+[[[6],9,4,10],[[0,7,[10,10,3,10],[3]],6],[[],[4],[[],[8,6,5,1],9,[],[1,3]]]]
\ No newline at end of file
diff --git a/AdventOfCode2022/Solutions/Day11.swift b/AdventOfCode2022/Solutions/Day11.swift
index 0d76f9b..882790c 100644
--- a/AdventOfCode2022/Solutions/Day11.swift
+++ b/AdventOfCode2022/Solutions/Day11.swift
@@ -43,7 +43,7 @@ struct Day11 {
             monkeys[i].commonTestNumber = commonNumber
         }
         
-        for round in 0..<10000{
+        for _ in 0..<10000{
             for (i, _) in monkeys.enumerated() {
                 
                 while (monkeys[i].items.count > 0) {
diff --git a/AdventOfCode2022/Solutions/Day13.swift b/AdventOfCode2022/Solutions/Day13.swift
new file mode 100644
index 0000000..a290546
--- /dev/null
+++ b/AdventOfCode2022/Solutions/Day13.swift
@@ -0,0 +1,121 @@
+//
+
+import Foundation
+
+
+struct Day13 {
+    
+    func solution1(_ input: String) throws -> Int {
+        
+        let inputPairs = parse(input)
+        
+        var sum = 0
+//        print("no of pairs: ", inputPairs.count)
+        print(inputPairs.last!)
+        for (index, pair) in inputPairs.enumerated() {
+            let lhs = try Packet.createFrom(pair.0)
+            let rhs = try Packet.createFrom(pair.1)
+            
+            if lhs < rhs {
+                sum += (index+1)
+            }
+            
+        }
+        
+        return sum
+    }
+    
+    func solution2(_ input: String) throws -> Int {
+        
+        var inputPairs = try parse(input)
+            .flatMap { [$0.0, $0.1] }
+            .map(Packet.createFrom)
+
+        let twoPacket = try Packet.createFrom("[[2]]")
+        let sixPacket = try Packet.createFrom("[[6]]")
+        
+        print("num of paris", inputPairs.count)
+        
+        inputPairs.append(twoPacket)
+        inputPairs.append(sixPacket)
+        
+        let sorted = inputPairs.sorted()
+                
+                
+        return (sorted.firstIndex(of: twoPacket)!+1) * (sorted.firstIndex(of: sixPacket)!+1)
+    }
+    
+    
+    func parse(_ input: String) -> [(String, String)] {
+        var pairs = [(String, String)]()
+        
+        var l1 = ""
+        var l2 = ""
+        
+        input.enumerateLines(invoking: { line, _ in
+            if line.isEmpty {
+                pairs.append((l1, l2))
+                l1 = ""
+                l2 = ""
+            } else {
+                if l1.isEmpty {
+                    l1 = line
+                } else {
+                    l2 = line
+                }
+            }
+        })
+        
+        pairs.append((l1, l2)) // FUUUU......
+        
+        return pairs
+    }
+}
+
+func isInOrder(_ lhs: Any, _ rhs: Any) -> Int {
+    
+    if let left = lhs as? Int, let right = rhs as? Int {
+        return left - right
+    } else if let left = lhs as? [Any], let right = rhs as? [Any] {
+        
+        let min = min(left.count, right.count)
+        
+        for i in 0..<min {
+            let l = left[i]
+            let r = right[i]
+            
+            let res = isInOrder(l, r)
+            if res != 0 {
+                return res
+            }
+        }
+        
+        return left.count - right.count
+        
+    } else if let left = lhs as? Int, let right = rhs as? [Any]  {
+        return isInOrder([left], right)
+    } else {
+        return isInOrder(lhs as! [Any], [rhs])
+    }
+    
+}
+
+struct Packet: Comparable {
+
+    static func == (lhs: Packet, rhs: Packet) -> Bool {
+        return lhs.str == rhs.str
+    }
+    
+    let data: [Any]
+    let str: String
+    
+    static func createFrom(_ string: String) throws -> Packet {
+        let array = try JSONSerialization.jsonObject(with: string.data(using: .utf8)!)
+        return Packet(data: array as! [Any], str: string)
+    }
+    
+    static func < (lhs: Packet, rhs: Packet) -> Bool {
+        return isInOrder(lhs.data, rhs.data) < 0
+    }
+
+}
diff --git a/AdventOfCode2022/main.swift b/AdventOfCode2022/main.swift
index 340b35a..b28d356 100644
--- a/AdventOfCode2022/main.swift
+++ b/AdventOfCode2022/main.swift
@@ -49,6 +49,9 @@ let inputLoader = InputLoader(inputPath: inputsPath)
 
 //day12
 //let result = Day12().solution1(inputLoader.loadFileAsString("day_12.txt"))
-let result = Day12().solution2(inputLoader.loadFileAsString("day_12.txt"))
+//let result = Day12().solution2(inputLoader.loadFileAsString("day_12.txt"))
 
+//day 13
+//let result = try Day13().solution1(inputLoader.loadFileAsString("day_13.txt"))
+let result = try Day13().solution2(inputLoader.loadFileAsString("day_13.txt"))
 print(result)