usnmarksdict.py

n = int(input("Enter No Of Students: "))
studentData = {}

for x in range(n):
	usn = input(f"Enter Usn of {x} student: ")
	marks = int(input("Enter Marks: "))
	studentData[usn] = marks

# creating list from dictonary 

marks = list(studentData.values())

maxi = max(marks) # maximum marks 
mini = min(marks) # minimum marks

morethan60 = []
morethan75 = []
morethan85 = []
lessthan60 = []




# finding range 

for k,v in studentData.items():
	if v > 85 and v <= 100:
		morethan85.append(k)

	elif v > 75 and v <=85 :
		morethan75.append(k)

	elif v > 60 and v <= 75:
		morethan60.append(k)

	else:
		lessthan60.append(k)

for k,v in studentData.items(): #iterating through values 
	if maxi == v:
		print("Maximum Marks: ",k,v)
	if mini == v:
		print("Minimum Marks: ",k,v)

	
print("More Than 85 ")
for x in morethan85:
	print(x)

	
print("More Than 75 ")
for x in morethan75:
	print(x)

print("More Than 60 ")
for x in morethan60:
	print(x)

print("Less Than 60 ")
for x in lessthan60:
	print(x)