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Go Back1. Validate a square.
2. Format a string by grouping characters found in the string into similar lengths.
3. How do you find two integers in the array such that their sum is 'target'?
4. How do you determine if a string is valid or not?
5. How can you find the third largest number in an array?
6. Find if the array contains a unique number of occurrences for each value in the array or not.
7. Determine if str1 is a subsequence of str2.
8. Find the largest two numbers in an array without sorting them.
9. Find unique vanishing numbers.
10. Create a running sum of a 1-D array.
11. Find if the robot returns to its home after given instructions or not.