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Understanding the Problem There is a list of numbers as nums. Each number has the value from 0 to 10^5. The program starts with the first index, which...
Understanding the Problem Each dial of the telephone has 3-4 letters on them. It is to have all the possible combination of the dials. For instance,...
Understanding the Problem There is a pyramid given with the length of n. From the bottom to top, the length of the floor is narrowed by 1. #...
Understanding the Problem The problem is direct and very simply understandable. Changing roman number to integer and returning the integer is the only...
Understanding the Problem This problem asks for the the depth(integer) of the tree as a return. But there are things that I had to consider. We do...
Understanding the Problem There is a sorted list of numbers. The numbers are either consecutive by 1 or non-consecutive. When the number are...