Yes and no. I'll keep it short:

Making a bracket is like working a math problem: each player must always have an opponent and end the end there can only be one. For now,you're planning for 50. When building a bracket, your total start number needs to be a MULTIPLE of 2. The reason for this is ensure "pairs" always exist. However, you will need to do backwards math in deciding your total number of entries. Using your currentfinal number, let's do the math:

50/2 = 25

As we see, there is a problem. Everyone gets to play in the first round but the second round would have to have a bye because of the odd number. This equals problems. Now, use reverse math. Again, we knkw we need to have one winner, now we just need to know how many bears to rock this party. Remember, multiples of 2:

2 - 4 - 8 - 16 - 32 - 64 and so on.

So basically, you take the last number and multiply by 2. This will ensure a equal number of opportunitys for all involved. For a good visual of this, google the NCAA Basketball Championships brackets. This is a 64 team bracket which couod give you a template to use.

Hope this helps!