Hackerrank – Problem description
The problem description – Hackerrank.
Solution
I found the solution on StackOverflow. One could use the Wikipedia as a source.
I created solution in:
All solutions are also available on my GitHub profile.
Java
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import java.util.Scanner; public class PythagoreanTriplet { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int tests = scanner.nextInt(); for (int i = 0; i < tests; i++) { int n = scanner.nextInt(); System.out.println(findTripletDirty(n)); } scanner.close(); } static long findTriplet(int number) { long maxTriplet = -1; for (int a = 1; a <= number / 3; a++) { int aSquare = a * a; for (int b = a + 1; b <= number / 2; b++) { int c = number - a - b; if(c > 0 && c * c == aSquare + b * b) { long product = (long) a * b * c; if(product > maxTriplet) { maxTriplet = product; } } } } return maxTriplet; } // http://stackoverflow.com/questions/2817848/find-pythagorean-triplet-for-which-a-b-c-1000 static long findTripletDirty(int number) { long max = -1; // sum of integer Pythagorean triplet is always even if(number % 2 == 0) { for (int b = 1; b < number / 2; b++) { if(number * (number / 2 - b) % (number - b) == 0) { int a = number * (number / 2 - b) / (number - b); int c = number - a - b; long product = (long) c * a * b; if(product > max) { max = product; } } } } return max; } } |