Given a non-empty array of integers, return the k most frequent elements.
{
"nums": [
1,
1,
1,
2,
2,
3
],
"k": 2
}[
1,
2
]{
"nums": [
1
],
"k": 1
}[
1
]{
"nums": [
4,
1,
-1,
2,
-1,
2,
3
],
"k": 2
}[
-1,
2
]Sign in to Run Code and Submit