leetcode-go/easy/21.go

package main

import (
	"strings"
    "fmt"
    "math"
)


/**
 * Definition for singly-linked list.
 * type ListNode struct {
 *     Val int
 *     Next *ListNode
 * }
 */
// lots of pits!! [] [1] [1 1 1]
func deleteDuplicates(head *ListNode) *ListNode {
    if head == nil { return nil }
    if head.Next == nil { return head }
    curr := head
    for curr != nil && curr.Next != nil {
        if curr.Next.Val == curr.Val {
            curr.Next = curr.Next.Next
        } else { curr = curr.Next }
    }
    return head
}