title: Search Insert And Delete In An Unsorted Array
signature: function searchInsertAndDeleteInAnUnsortedArray($arr, $n, $key) {
source_py: def search_insert_and_delete_in_an_unsorted_array(arr, n, key):
      for i in range(n):
          if (arr[i] == key):
              return i
      return (- 1)
source_cpp: int search_insert_and_delete_in_an_unsorted_array(vector<int> arr, int n, int key) {
    int i;
    for ( i = 0;
    i < n;
    i ++ ) if ( arr [ i ] == key ) return i;
    return - 1;
  }