2491-divide-players-into-teams-of-equal-skill

2491-divide-players-into-teams-of-equal-skill/soln.py

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+
+class Solution:
+    # pretty elementary approach
+    # in-place sort, so nlogn time, 1 space
+    def dividePlayers(self, skill: list[int]) -> int:
+        skill.sort()
+        sl = len(skill)
+        total_chem = 0
+        avg_team_skill = -1
+        for i in range((sl // 2) - 1, -1, -1):
+            team_skill = skill[i] + skill[sl - i - 1]
+            team_chem = skill[i] * skill[sl - i - 1]
+            if avg_team_skill == -1:
+                avg_team_skill = team_skill
+            elif team_skill != avg_team_skill:
+                return -1
+            total_chem += team_chem
+        return total_chem
+	# could go for a hashmap/dict approach