Created
February 13, 2017 08:56
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Checks if a number can be written as the sum of two cubes in two different ways: n = a³+b³ = c³+d³.
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| /*Number with dual Cube Sums | |
| TwoCubeSums | |
| which checks if a given number can be written as the sum of two cubes in two different ways: n = a³+b³ = c³+d³. All the numbers a, b, c and d should be different and greater than 0. | |
| e.g. 1729 = 9³+10³ = 1³+12³. | |
| */ | |
| public class CubeSumsClass { | |
| public static boolean hasTwoCubeSums(int n){ | |
| int checker = 0; | |
| for (int i = 0; i <=(int)Math.pow(n,1.0/3.0); i++) { | |
| for (int j = 0; j <=i ; j++) { | |
| if ((int)((Math.pow(i,3.0))+(Math.pow(j,3.0))) == n){ | |
| checker ++; | |
| if (checker == 1){System.out.println(checker+"st"+" Set of numbers are "+i+","+"j")} | |
| else{System.out.println(checker+"nd"+" Set of numbers are "+i+","+"j")} | |
| } | |
| } | |
| } | |
| if (checker >= 2){return true;} | |
| else {return false;} | |
| } | |
| } |
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