From 4f2a6833617a34feb1b5b0cf971e135cc55d9464 Mon Sep 17 00:00:00 2001
From: Derek Tong <109226053+derekjtong@users.noreply.github.com>
Date: Mon, 7 Oct 2024 14:28:36 -0700
Subject: [PATCH] Create 2405-optimal-partition-of-string.cpp

---
 cpp/2405-optimal-partition-of-string.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 cpp/2405-optimal-partition-of-string.cpp

diff --git a/cpp/2405-optimal-partition-of-string.cpp b/cpp/2405-optimal-partition-of-string.cpp
new file mode 100644
index 000000000..18b2c4619
--- /dev/null
+++ b/cpp/2405-optimal-partition-of-string.cpp
@@ -0,0 +1,17 @@
+class Solution {
+public:
+    int partitionString(string s) {
+        vector<int> lastSeen(26, -1);
+        int count = 1, substringStart = 0;
+
+        for (int i = 0; i < s.length(); i++) {
+            if (lastSeen[s[i] - 'a'] >= substringStart) {
+                count++;
+                substringStart = i;
+            }
+            lastSeen[s[i] - 'a'] = i;
+        }
+
+        return count;
+    }
+};