Problem 91 - Kotlin

I haven't used Kotlin in a very long time...the last time I used it was for problem 26. However, as it is basically a "Java with syntactic sugar" language, it was not too hard to use (especially as I had been writing my solution to Java before freeing it up on this problem with Kotlin). Really the main annoyance with Kotlin is that I have never managed to actually install it on my computer, so I have to use their online demo, which really is not that huge of an annoyance at all. Code runs in some relatively short amount of time that I couldn't really time because, yeah, online demo:

import java.util.Collections.*

fun min (x: Int, y: Int): Int {
  if (x < y) {
    return x;
  } else {
    return y;
  }
}

fun main(args : Array<String>) {
    var ans: Int = 0;
    var B: Int = 50 + 1;
    for (P1 in 1..((B*B) - 1)) {
        for (P2: Int in (P1+1)..((B*B - 1))) {
            var x1: Int = P1 / B;
            var y1: Int = P1 % B;
            var x2: Int = P2 / B;
            var y2: Int = P2 % B;
            var oldans = ans;
            if (min(x1, x2) == 0 &&  min(y1, y2) == 0) {
                //Right Angle at origin
                ++ans;
            } else if ((y1 == y2) && (x1  == 0 || x2 == 0)) {
                //undef slope, check explicitly
                ++ans;
            } else if ((x1 == x2) && (y1 == 0 || y2 == 0)) {
                //same
                ++ans;
            } else {
                //Negative reciprocals => right angle
                var num: Int   = y1 * (y1 - y2);
                var denom: Int = x1 * (x1 - x2);
                if (denom != 0) {
                    var ratio: Int = num / denom;
                    var rem: Int   = num % denom;
                    if ((ratio == -1) && (rem == 0)) {
                      ++ans;
                    }
                }
                num   = y2 * (y2 - y1);
                denom = x2 * (x2 - x1);
                if ((ans == oldans) && denom != 0) {
                    var ratio: Int = num / denom;
                    var rem: Int   = num % denom;
                    if ((ratio == -1) && (rem == 0)) {
                        ++ans;
                    }
                }
            }
        }
    }
    System.out.println(ans);
}