The Tournament Bracket

Sixteen players, one bracket, no mercy: neighbors pair off, winners advance, repeat until a champion stands. 🏆

You get the players as name:skill (a power of two of them, all skills different; higher skill wins). Round one pairs the 1st vs 2nd, 3rd vs 4th, and so on; winners keep their order into the next round. Print the champion's name.

Example:

Input: players = ["ana:5", "bo:3", "cy:9", "dee:1"] Output: cy

Round 1: ana(5) vs bo(3) — ana wins; cy(9) vs dee(1) — cy wins. Round 2: ana(5) vs cy(9) — cy wins, becoming champion.