docs: add 2083

Aden-Q · Jun 8, 2024 · b028386 · b028386
1 parent 6b762c1
commit b028386
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/src/2083.Substrings-That-Begin-and-End-With-the-Same-Letter.py b/src/2083.Substrings-That-Begin-and-End-With-the-Same-Letter.py
@@ -0,0 +1,11 @@
+class Solution:
+    def numberOfSubstrings(self, s: str) -> int:
+        counter = Counter()
+        prefix = ""
+        res = 0
+
+        for c in s:
+            counter[c] += 1
+            res += counter[c]
+
+        return res