diff --git a/AdventOfCode2023/src/day4/day4.zig b/AdventOfCode2023/src/day4/day4.zig
new file mode 100644
index 0000000..1a288e3
--- /dev/null
+++ b/AdventOfCode2023/src/day4/day4.zig
@@ -0,0 +1,139 @@
+const std = @import("std");
+const print = std.debug.print;
+
+pub fn solve(input: [][]const u8) !void {
+    var part1: u32 = 0;
+    const allocator = std.heap.page_allocator;
+
+    for (input) |line| {
+        var verticalVarSplit = std.mem.tokenizeSequence(u8, line, "|");
+
+        var myMap = std.AutoHashMap(u32, u32).init(allocator);
+
+        var winningNums = verticalVarSplit.next().?;
+        var myNums = verticalVarSplit.next().?;
+
+        var currentScore: u32 = 0;
+
+        // Card 1: 41 48 83 86 17 | 83 86  6 31 17  9 48 53
+
+        var spaceTokeniser = std.mem.tokenizeAny(u8, winningNums, " :");
+        _ = spaceTokeniser.next().?;
+        _ = spaceTokeniser.next().?;
+
+        while (spaceTokeniser.next()) |num| {
+            if (num.len > 0) {
+                try myMap.put(try std.fmt.parseInt(u32, num, 10), 1);
+            }
+        }
+
+        spaceTokeniser = std.mem.tokenizeAny(u8, myNums, " ");
+
+        while (spaceTokeniser.next()) |num| {
+            if (num.len > 0) {
+                var winningNum = try std.fmt.parseInt(u32, num, 10);
+                if (myMap.get(winningNum)) |_| {
+                    if (currentScore == 0) {
+                        currentScore = 1;
+                    } else {
+                        currentScore += currentScore;
+                    }
+                }
+            }
+        }
+
+        part1 += currentScore;
+        myMap.deinit();
+    }
+
+    var gamesProcessing = std.AutoHashMap(usize, u32).init(allocator);
+
+    var part2: u32 = 0;
+
+    for (input, 0..) |_, index| {
+        try gamesProcessing.put(index, 1);
+        part2 += 1;
+    }
+
+    var counter: usize = 0;
+
+    while (counter < 5) {
+        counter += 1;
+        var gamesPlayed = false;
+
+        for (1..input.len + 1) |gameIndex| {
+            var numOfGames = gamesProcessing.get(gameIndex);
+            // print("Game: {} | Num Of Games {?} \n", .{ gameIndex, numOfGames });
+
+            if (numOfGames) |i| {
+                if (i == 0) {
+                    continue;
+                }
+            } else {
+                continue;
+            }
+            gamesPlayed = true;
+
+            var line = input[gameIndex - 1];
+            var verticalVarSplit = std.mem.tokenizeSequence(u8, line, "|");
+
+            var myMap = std.AutoHashMap(u32, u32).init(allocator);
+
+            var winningNums = verticalVarSplit.next().?;
+            var myNums = verticalVarSplit.next().?;
+
+            var spaceTokeniser = std.mem.tokenizeAny(u8, winningNums, " :");
+            _ = spaceTokeniser.next().?;
+            _ = spaceTokeniser.next().?;
+
+            while (spaceTokeniser.next()) |num| {
+                if (num.len > 0) {
+                    try myMap.put(try std.fmt.parseInt(u32, num, 10), 1);
+                }
+            }
+
+            spaceTokeniser = std.mem.tokenizeAny(u8, myNums, " ");
+            var numbersWon: u32 = 0;
+
+            while (spaceTokeniser.next()) |num| {
+                if (num.len > 0) {
+                    var winningNum = try std.fmt.parseInt(u32, num, 10);
+                    if (myMap.get(winningNum)) |_| {
+                        numbersWon += 1;
+                    }
+                }
+            }
+
+            if (numbersWon == 0) {
+                continue;
+            }
+
+            // print("Adding: \n", .{});
+            for (gameIndex + 1..gameIndex + 1 + numbersWon) |i| {
+                // print("{}, ", .{i});
+                var currentNums: u32 = 0;
+                if (gamesProcessing.get(i)) |n| {
+                    currentNums = n;
+                }
+                try gamesProcessing.put(i, numOfGames.? + currentNums);
+                part2 += numOfGames.?;
+            }
+            // print("\n", .{});
+            myMap.deinit();
+
+            try gamesProcessing.put(gameIndex, 0);
+        }
+
+        if (!gamesPlayed) {
+            break;
+        }
+    }
+
+    for (input, 0..) |line, index| {
+        _ = line;
+        _ = index;
+    }
+
+    print("Part 1: {}\n", .{part1});
+    print("Part 2: {}\n", .{part2});
+}
diff --git a/AdventOfCode2023/src/main.zig b/AdventOfCode2023/src/main.zig
index 6f643c8..54e5e31 100644
--- a/AdventOfCode2023/src/main.zig
+++ b/AdventOfCode2023/src/main.zig
@@ -1,13 +1,14 @@
 const std = @import("std");
 // const day1 = @import("./day1/day1.zig");
 // const day2 = @import("./day2/day2.zig");
-const day3 = @import("./day3/day3.zig");
+// const day3 = @import("./day3/day3.zig");
+const day4 = @import("./day4/day4.zig");
 const utils = @import("utils.zig");
 
 pub fn main() !void {
     const allocator = std.heap.page_allocator;
-    var input = try utils.getInput("./src/day3/input.txt", allocator);
+    var input = try utils.getInput("./src/day4/input.txt", allocator);
     defer allocator.free(input);
 
-    try day3.solve(input);
+    try day4.solve(input);
 }