/**
 * @Company Riot Games
 *
 * Given a list of kills, return the start of the 30 second window that contains the most number of kills.
 * A kill is defined as an integer array of the format [ timestamp, killerId, victimId ].
 * If there is a tie, then return an array of all the windows.
 *
 * The return format should be a list of all the windows with the most number of kills in the format of an array.
 * [ timestamp, number of kills ]
 */
public int[][] mostActiveKillWindow(int[][] kills) { }
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