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class Student:
    def __init__(self, name):
        self.name, self.grades = name, []
    
    def add_grade(self, g): self.grades.append(g)
    def avg(self): return sum(self.grades) / len(self.grades) if self.grades else 0
    def info(self): print(f"{self.name}: {self.grades}, средний: {self.avg()}")