An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. For example, 153 is an Armstrong number since 1^3 + 5^3 + 3^3 = 153.
Generate a vector like 1,2,2,3,3,3,4,4,4,4
matrix of natural number
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Replacing a row
match 2 string
give-nth-decimal-place-of-pi up to 100 digits
check wether armstrong no or not
Who invented zero?
MATCH THE STRINGS (2 CHAR) very easy
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