diff --git a/src/day17.rs b/src/day17.rs
index cefedfe..82dc1e6 100644
--- a/src/day17.rs
+++ b/src/day17.rs
@@ -8,6 +8,8 @@ pub struct Day17 {
     y_max: i32,
 }
 
+const Y_MAX: i32 = 100;
+
 impl Day for Day17 {
     fn init(content: String) -> anyhow::Result<Self> {
         let c = content.split(' ').skip(1).collect::<Vec<_>>();
@@ -23,9 +25,10 @@ impl Day for Day17 {
     }
 
     fn part1(&self) -> anyhow::Result<String> {
+        println!("{}", self.y_max - self.y_min);
         let mut hits = Vec::new();
         for dx in 0..=self.x_max {
-            for dy in -100..250 {
+            for dy in self.y_min..Y_MAX {
                 let points = self.calc((dx, dy));
                 if self.hits(&points) {
                     hits.push(max_height(&points).unwrap());
@@ -38,7 +41,7 @@ impl Day for Day17 {
     fn part2(&self) -> anyhow::Result<String> {
         let mut hits = Vec::new();
         for dx in 0..=self.x_max {
-            for dy in -100..250 {
+            for dy in self.y_min..Y_MAX {
                 let points = self.calc((dx, dy));
                 if self.hits(&points) {
                     hits.push((dx, dy));