Find the Number of Winning Players

Description

You are given an integer n representing the number of players in a game and a 2D array pick where pick[i] = [xi, yi] represents that the player xi picked a ball of color yi.

Player i wins the game if they pick strictly more than i balls of the same color. In other words,

- Player 0 wins if they pick any ball.

- Player 1 wins if they pick at least two balls of the same color.

- ...

- Player i wins if they pick at least i + 1 balls of the same color.

Return the number of players who win the game.

Note that multiple players can win the game.