Created
November 26, 2015 19:00
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LeetCode helper methods for console debugging
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| static { | |
| System.setOut(new java.io.PrintStream(new java.io.FilterOutputStream(System.out) { | |
| int count = 10 * 1024; | |
| @Override public void write(int b) throws IOException { | |
| if (count > 0) { | |
| super.write(b); | |
| --count; | |
| } | |
| } | |
| @Override public void write(byte[] b, int off, int len) throws IOException { | |
| if (count > 0) { | |
| len = Math.min(count, len); | |
| super.write(b, off, len); | |
| count -= len; | |
| } | |
| } | |
| })); | |
| } |
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| private static String val(ListNode node) { | |
| return node != null ? String.valueOf(node.val) : "null"; | |
| } | |
| private static String list(ListNode head) { | |
| return list("", head, -1); | |
| } | |
| private static String list(ListNode head, int k) { | |
| return list("", head, k); | |
| } | |
| private static String list(String label, ListNode head) { | |
| return list(label, head, -1); | |
| } | |
| private static String list(String label, ListNode head, int k) { | |
| StringBuilder sb = new StringBuilder(); | |
| sb.append(label).append("["); | |
| ListNode slow = head; | |
| ListNode fast = head; | |
| while (slow != null) { | |
| sb.append(val(slow)); | |
| if (slow.next != null) { | |
| sb.append(", "); | |
| } | |
| if (--k == 0) { | |
| if (slow.next != null) sb.append("..."); | |
| break; | |
| } | |
| slow = slow.next; | |
| fast = fast != null && fast.next != null? fast.next.next : null; | |
| if (fast != null && slow == fast) { | |
| slow = head; | |
| while (slow != fast) { | |
| sb.append(val(fast)); | |
| if (fast.next != null) { | |
| sb.append(", "); | |
| } | |
| slow = slow.next; | |
| fast = fast.next; | |
| } | |
| sb.append("cycle from "); | |
| sb.append(val(slow)); | |
| break; | |
| } | |
| } | |
| sb.append("]"); | |
| return sb.toString(); | |
| } |
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