Given a string str, convert the first letter of each word in the string to uppercase.
Example 1:
Input:
str = "i love programming"
Output: "I Love Programming"
Explanation:
'I', 'L', 'P' are the first letters of
the three words.
Your Task:
You dont need to read input or print anything. Complete the function transform() which takes s as input parameter and returns the transformed string.
Expected Time Complexity: O(N)
Expected Auxiliary Space: O(N) to store resultant string
Constraints:
1 <= N <= 10^{4}
The original string str only consists of lowercase alphabets and spaces to separate words.

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