Fix fitness computation

src/main.py

@@ -15,14 +15,33 @@ def execute_algorithm(choice, n, m, data):
         exit(1)
 
 
-def show_results(solutions, time_delta):
-    distance_sum = solutions["distance"].sum()
+def get_row_distance(source, destination, data):
+    row = data.query(
+        """(source == @source and destination == @destination) or \
+        (source == @destination and destination == @source)"""
+    )
+    return row["distance"].values[0]
+
+
+def get_fitness(solutions, data):
+    counter = 0
+    for i in range(len(solutions) - 1):
+        for j in range(i + 1, len(solutions)):
+            counter += get_row_distance(
+                source=solutions["point"].iloc[i],
+                destination=solutions["point"].iloc[j],
+                data=data,
+            )
+    return counter
+
+
+def show_results(solutions, fitness, time_delta):
     duplicates = solutions.duplicated().any()
     print(solutions)
-    print("Total distance: " + str(distance_sum))
+    print(f"Total distance: {fitness}")
     if not duplicates:
         print("No duplicates found")
-    print("Execution time: " + str(time_delta))
+    print(f"Execution time: {time_delta}")
 
 
 def usage(argv):
@@ -40,7 +59,8 @@ def main():
     start_time = time()
     solutions = execute_algorithm(choice=argv[2], n=n, m=m, data=data)
     end_time = time()
-    show_results(solutions, time_delta=end_time - start_time)
+    fitness = get_fitness(solutions, data)
+    show_results(solutions, fitness, time_delta=end_time - start_time)
 
 
 if __name__ == "__main__":