Finish day 20

1 files changed, 9 insertions, 0 deletions

diff --git a/aoc-2020-gleam/src/ext/intx.gleam b/aoc-2020-gleam/src/ext/intx.gleam
index 5c9bcc0..aec513b 100644
--- a/aoc-2020-gleam/src/ext/intx.gleam
+++ b/aoc-2020-gleam/src/ext/intx.gleam
@@ -1,6 +1,8 @@
 import gleam/int
 import gleam/bool
+import gleam/float
 import gleam/order.{Eq, Gt, Lt}
+import ext/resultx as resx
 
 pub fn is_between(number: Int, min: Int, and max: Int) {
   min <= number && number <= max
@@ -35,3 +37,10 @@ fn do_reverse_bits(val: Int, rev: Int, length: Int) -> Int {
 pub fn reverse_bits(val: Int, length: Int) -> Int {
   do_reverse_bits(val, 0, length)
 }
+
+pub fn sqrt(x: Int) {
+  x
+  |> int.square_root
+  |> resx.assert_unwrap
+  |> float.round
+}