diff --git a/exercises/04_primitive_types/primitive_types3.rs b/exercises/04_primitive_types/primitive_types3.rs
index 8b0de44e..2face631 100644
--- a/exercises/04_primitive_types/primitive_types3.rs
+++ b/exercises/04_primitive_types/primitive_types3.rs
@@ -5,10 +5,11 @@
 // Execute `rustlings hint primitive_types3` or use the `hint` watch subcommand
 // for a hint.
 
-// I AM NOT DONE
+
 
 fn main() {
-    let a = ???
+    // let a = [0; 100];
+    let a : [i32;100] = (0..100).collect::<Vec<i32>>().try_into().unwrap_or_else(|v : Vec<i32>| panic!("Expected a vec length of {} but it was {}",100,v.len()));
 
     if a.len() >= 100 {
         println!("Wow, that's a big array!");