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28. Print all the Armstrong numbers in the range of 100 to 1000
29. The current population of a town is 10000. Write a program to find out the population at the end of each of the last 10 years.
30. Write a program to print all the unique combinations of 1, 2, 3, and 4

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28. Print all the Armstrong numbers in the range of 100 to 1000
29. The current population of a town is 10000. Write a program to find out the population at the end of each of the last 10 years. For eg current population is 10000 so the output should be like this:
    • 10th year - 10000
    • 9th year - 9000
    • 8th year - 8100 and so on
30. Write a program to print all the unique combinations of 1, 2, 3, and 4

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