The k most frequent numbers
medium
The first line has n and k. The second line has n integers. Print the k numbers that appear most often, from most to least frequent, separated by spaces; break ties by the smaller number first.
Example 1: input
6 2 1 1 1 2 2 3
Output
1 2
Example 2: input
1 1 1
Output
1
Plus 2 hidden tests when you check your answer.
Your solution
Read from standard input and print the answer. Run it on the examples as often as you like, then check it against every test.
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Open hints one at a time. The write-up explains a full solution.
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