diff --git a/exercises/11_hashmaps/hashmaps3.rs b/exercises/11_hashmaps/hashmaps3.rs
index 08e977c3..771eb8f9 100644
--- a/exercises/11_hashmaps/hashmaps3.rs
+++ b/exercises/11_hashmaps/hashmaps3.rs
@@ -14,8 +14,6 @@
 // Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 use std::collections::HashMap;
 
 // A structure to store the goal details of a team.
@@ -39,6 +37,25 @@ fn build_scores_table(results: String) -> HashMap<String, Team> {
         // will be the number of goals conceded from team_2, and similarly
         // goals scored by team_2 will be the number of goals conceded by
         // team_1.
+        scores.entry(team_1_name.clone()).or_insert(Team {
+            goals_scored: 0,
+            goals_conceded: 0
+        });
+
+        scores.entry(team_2_name.clone()).or_insert(Team {
+            goals_scored: 0,
+            goals_conceded: 0
+        });
+
+        if let Some(team) = scores.get_mut(&team_1_name) {   
+            team.goals_scored += team_1_score;
+            team.goals_conceded += team_2_score;
+        }
+
+        if let Some(team) = scores.get_mut(&team_2_name) {
+            team.goals_scored += team_2_score;            
+            team.goals_conceded += team_1_score;
+        }
     }
     scores
 }