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Problem 1472. nth Rational Number

Created by G K

Return the nth rational number.

This is the inverse to Problem 1471. Index of a Rational number

The first ten positive rational numbers under the enumeration using cantors diagonalization argument are 1/1, 2/1, 1/2, 3/1, 2/2, 1/3, 4/1, 3/2, 2/3, 1/4.

Find the index of a positive rational number enumerated in this manner, i.e. the 6th rational number is 1/3.

Problem 2) Prev: 1471 Next: 1477

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9 correct solutions 9 incorrect solutions
Last solution submitted on Dec 01, 2014

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