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# 1. 有序数组的 Two Sum
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- [ 167\. Two Sum II - Input array is sorted (Easy)] ( https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/description/ )
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+ 167\. Two Sum II - Input array is sorted (Easy)
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+
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+ [ Leetcode] ( https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/description/ ) / [ 力扣] ( https://leetcode-cn.com/problems/two-sum-ii-input-array-is-sorted/description/ )
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``` html
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Input: numbers={2, 7, 11, 15}, target=9
@@ -47,7 +49,9 @@ public int[] twoSum(int[] numbers, int target) {
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# 2. 两数平方和
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- [ 633. Sum of Square Numbers (Easy)] ( https://leetcode.com/problems/sum-of-square-numbers/description/ )
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+ 633 . Sum of Square Numbers (Easy)
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+
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+ [ Leetcode] ( https://leetcode.com/problems/sum-of-square-numbers/description/ ) / [ 力扣] ( https://leetcode-cn.com/problems/sum-of-square-numbers/description/ )
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``` html
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Input: 5
@@ -76,7 +80,9 @@ public boolean judgeSquareSum(int c) {
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# 3. 反转字符串中的元音字符
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- [ 345. Reverse Vowels of a String (Easy)] ( https://leetcode.com/problems/reverse-vowels-of-a-string/description/ )
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+ 345 . Reverse Vowels of a String (Easy)
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+
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+ [ Leetcode] ( https://leetcode.com/problems/reverse-vowels-of-a-string/description/ ) / [ 力扣] ( https://leetcode-cn.com/problems/reverse-vowels-of-a-string/description/ )
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``` html
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Given s = "leetcode", return "leotcede".
@@ -109,7 +115,9 @@ public String reverseVowels(String s) {
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# 4. 回文字符串
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- [ 680. Valid Palindrome II (Easy)] ( https://leetcode.com/problems/valid-palindrome-ii/description/ )
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+ 680 . Valid Palindrome II (Easy)
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+
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+ [ Leetcode] ( https://leetcode.com/problems/valid-palindrome-ii/description/ ) / [ 力扣] ( https://leetcode-cn.com/problems/valid-palindrome-ii/description/ )
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``` html
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Input: "abca"
@@ -141,7 +149,9 @@ private boolean isPalindrome(String s, int i, int j) {
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# 5. 归并两个有序数组
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- [ 88. Merge Sorted Array (Easy)] ( https://leetcode.com/problems/merge-sorted-array/description/ )
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+ 88 . Merge Sorted Array (Easy)
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+
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+ [ Leetcode] ( https://leetcode.com/problems/merge-sorted-array/description/ ) / [ 力扣] ( https://leetcode-cn.com/problems/merge-sorted-array/description/ )
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``` html
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Input:
@@ -175,7 +185,9 @@ public void merge(int[] nums1, int m, int[] nums2, int n) {
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# 6. 判断链表是否存在环
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- [ 141. Linked List Cycle (Easy)] ( https://leetcode.com/problems/linked-list-cycle/description/ )
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+ 141 . Linked List Cycle (Easy)
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+ [ Leetcode] ( https://leetcode.com/problems/linked-list-cycle/description/ ) / [ 力扣] ( https://leetcode-cn.com/problems/linked-list-cycle/description/ )
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使用双指针,一个指针每次移动一个节点,一个指针每次移动两个节点,如果存在环,那么这两个指针一定会相遇。
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@@ -198,7 +210,9 @@ public boolean hasCycle(ListNode head) {
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# 7. 最长子序列
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- [ 524. Longest Word in Dictionary through Deleting (Medium)] ( https://leetcode.com/problems/longest-word-in-dictionary-through-deleting/description/ )
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+ 524 . Longest Word in Dictionary through Deleting (Medium)
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+
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+ [ Leetcode] ( https://leetcode.com/problems/longest-word-in-dictionary-through-deleting/description/ ) / [ 力扣] ( https://leetcode-cn.com/problems/longest-word-in-dictionary-through-deleting/description/ )
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```
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Input:
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