advent of code day 2 (only first part tho)

examples/puzzles/aoc2025_02.zr

@@ -0,0 +1,60 @@
+func part1_is_invalid_id[s: String] : Bool
+    let len: I64 = str.len(s)
+    if len % 2 != 0
+        return false
+
+    let first: String = str.substr(s, 0, len / 2)
+    let second: String = str.substr(s, len / 2, len / 2)
+
+    return str.equal(first, second)
+
+func part1[ranges: Array] : Void
+    let sum: I64 = 0
+
+    for i in 0..array.size(ranges)
+        let parts: Array = array.nth(ranges, i) |> str.split("-")
+        let start: I64 = array.nth(parts, 0) |> str.parse_i64()
+        let end: I64 = array.nth(parts, 1) |> str.parse_i64()
+
+        for n in (start)..end+1
+            if part1_is_invalid_id(str.from_i64(n))
+                sum = sum + n
+    
+    io.println_i64(sum)
+
+// had to cheat this one
+func part2_is_invalid_id[s: String] : Bool
+    let len: I64 = str.len(s)
+    if len < 2
+        return false
+    for div in 1..(len / 2 + 1)
+        if len % div == 0
+            let u: String = str.substr(s, 0, div)
+            let is_repeat: Bool = true
+            for k in 1..(len / div)
+                let segment: String = str.substr(s, k * div, div)
+                if !str.equal(segment, u)
+                    is_repeat = false
+            if is_repeat
+                return true
+    return false
+
+func part2[ranges: Array] : Void
+    let sum: I64 = 0
+
+    for i in 0..array.size(ranges)
+        let parts: Array = array.nth(ranges, i) |> str.split("-")
+        let start: I64 = array.nth(parts, 0) |> str.parse_i64()
+        let end: I64 = array.nth(parts, 1) |> str.parse_i64()
+
+        for n in (start)..end+1
+            if part2_is_invalid_id(str.from_i64(n))
+                sum = sum + n
+    
+    io.println_i64(sum)
+
+func main[] : I64
+    let ranges: Array = io.read_file("input.txt") |> str.split(",")
+
+    part1(ranges)
+    part2(ranges)