- Find the position of the given row in a 2-D array
- Smallest power of 4 greater than or equal to N
- Sum of all natural numbers from L to R ( for large values of L and R )
- Convert an unbalanced bracket sequence to a balanced sequence
- Minimum given operations required to convert a given binary string to all 1's
- Check if a cycle of length 3 exists or not in a graph that satisfy a given condition
- Find the path from root to the given nodes of a tree for multiple queries
- Check whether a node is leaf node or not for multiple queries

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