Meta interview E5 US

Round 1: Phone Screen

Questions:

1. Subarray Sum Equals K (only positive numbers could use sliding window)
2. Clone graph (need to specify input and output yourself)

Round 2: Virtual Onsite

Questions:

1. Minimum departure and return cost (2 arrays, one for departure and the other for return)
2. Merge 3 sorted arrays
3. Given an array, randomly output index of the maximum value in array
4. Given an expression such as ( + 3 2 ( * 4 6 ) ), return its output value