score_exam = float(input('กรอกคะแนนสอบ: '))
score_homework = float(input('กรอกคะแนนงาน: '))
score_participation = float(input('กรอกคะแนนการมีส่วนร่วม: '))
total_score = score_exam + score_homework + score_participation
if total_score > 75:
    grade = "H"
elif total_score >= 50:
    grade = "S"
else:
    grade = "U"
print("คะแนนรวม:", total_score)
print("เกรด:", grade)

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