The nth Taxicab number Taxicab(n), also called the n-th Hardy-Ramanujan number, is defined as the smallest number that can be expressed as a sum of two positive cube numbers in n distinct ways.
The most famous taxicab number is 1729 = Taxicab(2) = (1 ^ 3) + (12 ^ 3) = (9 ^ 3) + (10 ^ 3).
Given a number N, print first N Taxicab(2) numbers.
Input : N = 1 Output : 1729 Explanation : 1729 = (1 ^ 3) + (12 ^ 3) = (9 ^ 3) + (10 ^ 3) Input : N = 2 Output : 1729 4104 Explanation : 1729 = (1 ^ 3) + (12 ^ 3) = (9 ^ 3) + (10 ^ 3) 4104 = (16 ^ 3) + (2 ^ 3) = (15 ^ 3) + (9 ^ 3)
We try all numbers one by one and check if it is a taxicab number. To check if a number is Taxucab, we use two nested loops :
In outer loop, we calculate cube root of a number.
In inner loop, we check if there is a cube-root which yield the result.
1 1729 2 4104 3 13832 4 20683 5 32832
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Improved By : jit_t