def determine_pass_fail(scores, passing_score=50):
  """
  Determines if a student passes or fails based on their scores in multiple subjects.
 
  Args:
    scores: A dictionary where keys are subject names and values are scores.
    passing_score: The minimum score required to pass in each subject.
 
  Returns:
    "Pass" if the student passes in all subjects, "Fail" otherwise.
  """
 
  for subject, score in scores.items():
    if score < passing_score:
      return "Fail"  # Fails if any subject is below passing score
  return "Pass"  # Passes only if all subjects are above passing score
 
 
# Example usage:
student_scores = {
    "Math": 75,
    "Science": 60,
    "English": 80,
    "History": 45 
}
 
result = determine_pass_fail(student_scores)
print(f"The student's result is: {result}") 

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