Movie History Friends II
Examples
Example 1:
Input: history = {1: ["A", "B", "C", "D"], 2: ["X", "D", "B", "A"], 3: ["P", "Q", "R", "S"]}, k = 3, m = 2
Output: [[1, 2]]
Explanation:
Example 2:
Input: history = {1: ["A", "B", "C"], 2: ["C", "B", "A"], 3: ["A", "B", "C"]}, k = 3, m = 3
Output: [[1, 2], [1, 3], [2, 3]]
Explanation:
Example 3:
Input: history = {1: ["A", "B", "C"], 2: ["D", "E", "F"]}, k = 3, m = 1
Output: []
Explanation: