gist for leetcode 83

removeDuplicatesFromSortedLinkList.cpp

/**
 * Definition for singly-linked list.
 * struct ListNode {
 *     int val;
 *     ListNode *next;
 *     ListNode(int x) : val(x), next(NULL) {}
 * };
 */
class Solution {
public:
    ListNode* deleteDuplicates(ListNode* head) {
        if(!head) {
            return NULL;
        }
        
        ListNode *prv = head;
        ListNode *curr = head->next;        
        
        while(curr) {
            if(curr->val > prv->val) {
                prv->next = curr;
                prv = curr;
            }
            
            curr = curr->next;
        }
        
        prv->next = curr;
        
        return head;
    }
};