🚀 #LeetCode POTD (Day 29) ✅
Adding Spaces to a String

💡 Approach (String Manipulation):

1️⃣ Initialize an empty string res.
2️⃣ Traverse s, checking indices in spaces.
3️⃣ Append ' ' to res if the current index matches spaces.
4️⃣ Append each character from s to res.
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