from functools import total_ordering


@total_ordering
class Student:
    def __init__(self, name, grade):
        self.name = name
        self.grade = grade

    def __eq__(self, other) -> bool:
        # Compara por calificación
        return (self.grade == other.grade)

    def __lt__(self, other) -> bool:
        # Determina si este estudiante tiene calificación menor
        return (self.grade < other.grade)


def rank_students(students):
    objs = [Student(s["name"], s["grade"]) for s in students]
    return [s.name for s in sorted(objs)]