My way of doing this

java/logic-2/makeBricks.java

@@ -2,8 +2,20 @@
  * of small bricks (1 inch each) and big bricks (5 inches each). Return true 
  * if it is possible to make the goal by choosing from the given bricks.
  */
-public boolean makeBricks(int small, int big, int goal) {
-    int remainder = goal >= (5 * big) ? goal - (5 * big) : goal % 5;
-
-    return small >= remainder;
+public int loneSum(int a, int b, int c) {
+  if (a == b && b == c && a == c) {
+    return 0;
+  }
+  else if (a == b) {
+    return c;
+  }
+  else if (b == c) {
+    return a;
+  }
+  else if (a == c) {
+    return b;
+  }
+  else {
+    return a + b + c;
+  }
 }