input: Write a function to create a dictionary containing student names and marks as key-value pairs. If the input is empty, return an empty dictionary.
  assert construct_student_marks([]) == {}
  assert construct_student_marks([("John", 90), ("Levi", 85), ("Jill", 95), ("Sara", 75)]) == {"John": 90, "Levi": 85, "Jill": 95, "Sara": 75}
  assert construct_student_marks([("John", 90), ("Levi", 85)]) == {"John": 90, "Levi": 85}
  assert construct_student_marks([("Jill", 95)]) == {"Jill": 95}
  assert construct_student_marks([("Sara", 75), ("Jill", 95), ("John", 90), ("Levi", 85)]) == {"Sara": 75, "Jill": 95, "John": 90, "Levi": 85}
output: def construct_student_marks(students):
      return {name: mark for name, mark in students}