another aoc solution

examples/puzzles/euler_02.zr

@@ -0,0 +1,21 @@
+func num_divisors[n: I64] : I64
+    let end: I64 = math.isqrt(n)
+
+    let out: I64 = 0
+    for i in 1..end+1
+        if n % i == 0
+            out = out + 2
+
+    if end * end == n
+        out = out - 1
+    return out
+
+func main[] : I64
+    let n: I64 = 0
+    let i: I64 = 1
+    while true
+        n = n + i
+        if num_divisors(n) > 500
+            io.println_i64(n)
+            break
+        i = i + 1