diff --git a/day2/zig/input.txt b/day2/zig/input.txt
new file mode 100644
index 0000000..7d2d160
--- /dev/null
+++ b/day2/zig/input.txt
@@ -0,0 +1 @@
+5542145-5582046,243-401,884211-917063,1174-1665,767028-791710,308275-370459,285243789-285316649,3303028-3361832,793080-871112,82187-123398,7788-14096,21-34,33187450-33443224,2750031-2956556,19974-42168,37655953-37738891,1759-2640,55544-75026,9938140738-9938223673,965895186-966026269,502675-625082,11041548-11204207,1-20,3679-7591,8642243-8776142,40-88,2872703083-2872760877,532-998,211488-230593,3088932-3236371,442734-459620,8484829519-8484873271,5859767462-5859911897,9987328-10008767,656641-673714,262248430-262271846
diff --git a/day2/zig/main.zig b/day2/zig/main.zig
new file mode 100644
index 0000000..ad7fcd9
--- /dev/null
+++ b/day2/zig/main.zig
@@ -0,0 +1,600 @@
+const std = @import("std");
+
+const Range = struct { begin: u64, end: u64 };
+
+pub fn main() !void {
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    var stdin_buffer: [1024]u8 = undefined;
+    var stdin_reader = std.fs.File.stdin().reader(&stdin_buffer);
+
+    const stdin = &stdin_reader.interface;
+
+    const allocator = gpa.allocator();
+    var ranges = try std.ArrayList(Range).initCapacity(allocator, 1);
+    defer ranges.deinit(allocator);
+
+    while (try stdin.takeDelimiter(',')) |range_str| {
+        const range_str_trimmed = std.mem.trim(u8, range_str, "\n");
+
+        var it = std.mem.splitScalar(u8, range_str_trimmed, '-');
+
+        const begin = try std.fmt.parseInt(u64, it.next().?, 10);
+        const end = try std.fmt.parseInt(u64, it.next().?, 10);
+
+        const range = Range{ .begin = begin, .end = end };
+
+        try ranges.append(allocator, range);
+    }
+
+    var i: u64 = 1;
+    var task1: u64 = 0;
+    var task2: u64 = 0;
+    var founds = try std.ArrayList(u64).initCapacity(allocator, 1);
+    defer founds.deinit(allocator);
+    while (i < 1000000) : (i += 1) {
+        var n: u64 = i;
+        var digits: u64 = 0;
+        var number: u64 = i;
+
+        while (n != 0) {
+            digits += 1;
+            n /= 10;
+        }
+
+        // doubles
+        for (0..digits) |_| {
+            number *= 10;
+        }
+        number += i;
+
+        for (ranges.items) |range| {
+            if (number <= range.end and number >= range.begin) {
+                task1 += number;
+                var f = false;
+                for (founds.items) |found| {
+                    if (found == number) {
+                        f = true;
+                        break;
+                    }
+                }
+                if (!f) {
+                    task2 += number;
+                    try founds.append(allocator, number);
+                }
+
+                break;
+            }
+        }
+
+        number = 0;
+        // Triples
+        if (i < 10000) {
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (ranges.items) |range| {
+                if (number <= range.end and number >= range.begin) {
+                    var f = false;
+                    for (founds.items) |found| {
+                        if (found == number) {
+                            f = true;
+                            break;
+                        }
+                    }
+                    if (!f) {
+                        task2 += number;
+                        try founds.append(allocator, number);
+                    }
+                    break;
+                }
+            }
+        }
+        number = 0;
+        // 4s
+        if (i < 1000) {
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (ranges.items) |range| {
+                if (number <= range.end and number >= range.begin) {
+                    var f = false;
+                    for (founds.items) |found| {
+                        if (found == number) {
+                            f = true;
+                            break;
+                        }
+                    }
+                    if (!f) {
+                        task2 += number;
+                        try founds.append(allocator, number);
+                    }
+                    break;
+                }
+            }
+        }
+        number = 0;
+        // 5s
+        if (i < 1000) {
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (ranges.items) |range| {
+                if (number <= range.end and number >= range.begin) {
+                    var f = false;
+                    for (founds.items) |found| {
+                        if (found == number) {
+                            f = true;
+                            break;
+                        }
+                    }
+                    if (!f) {
+                        task2 += number;
+                        try founds.append(allocator, number);
+                    }
+                    break;
+                }
+            }
+        }
+        number = 0;
+        // 6s
+        if (i < 100) {
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (ranges.items) |range| {
+                if (number <= range.end and number >= range.begin) {
+                    var f = false;
+                    for (founds.items) |found| {
+                        if (found == number) {
+                            f = true;
+                            break;
+                        }
+                    }
+                    if (!f) {
+                        task2 += number;
+                        try founds.append(allocator, number);
+                    }
+                    break;
+                }
+            }
+        }
+        number = 0;
+        // 7s
+        if (i < 100) {
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (ranges.items) |range| {
+                if (number <= range.end and number >= range.begin) {
+                    var f = false;
+                    for (founds.items) |found| {
+                        if (found == number) {
+                            f = true;
+                            break;
+                        }
+                    }
+                    if (!f) {
+                        task2 += number;
+                        try founds.append(allocator, number);
+                    }
+                    break;
+                }
+            }
+        }
+        number = 0;
+        // 8s
+        if (i < 100) {
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (ranges.items) |range| {
+                if (number <= range.end and number >= range.begin) {
+                    var f = false;
+                    for (founds.items) |found| {
+                        if (found == number) {
+                            f = true;
+                            break;
+                        }
+                    }
+                    if (!f) {
+                        task2 += number;
+                        try founds.append(allocator, number);
+                    }
+                    break;
+                }
+            }
+        }
+        number = 0;
+        // 9s
+        if (i < 100) {
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (ranges.items) |range| {
+                if (number <= range.end and number >= range.begin) {
+                    var f = false;
+                    for (founds.items) |found| {
+                        if (found == number) {
+                            f = true;
+                            break;
+                        }
+                    }
+                    if (!f) {
+                        task2 += number;
+                        try founds.append(allocator, number);
+                    }
+                    break;
+                }
+            }
+        }
+        number = 0;
+        // 10s
+        if (i < 100) {
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (ranges.items) |range| {
+                if (number <= range.end and number >= range.begin) {
+                    var f = false;
+                    for (founds.items) |found| {
+                        if (found == number) {
+                            f = true;
+                            break;
+                        }
+                    }
+                    if (!f) {
+                        task2 += number;
+                        try founds.append(allocator, number);
+                    }
+                    break;
+                }
+            }
+        }
+        number = 0;
+        // 11s
+        if (i < 10) {
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (ranges.items) |range| {
+                if (number <= range.end and number >= range.begin) {
+                    var f = false;
+                    for (founds.items) |found| {
+                        if (found == number) {
+                            f = true;
+                            break;
+                        }
+                    }
+                    if (!f) {
+                        task2 += number;
+                        try founds.append(allocator, number);
+                    }
+                    break;
+                }
+            }
+        }
+        number = 0;
+        // 12s
+        if (i < 10) {
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (0..digits) |_| {
+                number *= 10;
+            }
+            number += i;
+
+            for (ranges.items) |range| {
+                if (number <= range.end and number >= range.begin) {
+                    var f = false;
+                    for (founds.items) |found| {
+                        if (found == number) {
+                            f = true;
+                            break;
+                        }
+                    }
+                    if (!f) {
+                        task2 += number;
+                        try founds.append(allocator, number);
+                    }
+                    break;
+                }
+            }
+        }
+        number = 0;
+    }
+
+    std.debug.print("{d}\n", .{task1});
+    std.debug.print("{d}\n", .{task2});
+}
diff --git a/day2/zig/sample.txt b/day2/zig/sample.txt
new file mode 100644
index 0000000..a3f22ef
--- /dev/null
+++ b/day2/zig/sample.txt
@@ -0,0 +1 @@
+11-22,95-115,998-1012,1188511880-1188511890,222220-222224,1698522-1698528,446443-446449,38593856-38593862,565653-565659,824824821-824824827,2121212118-2121212124