摘要:
class Solution { public boolean isValid(String s) { int len=s.length()/2; for (int i = 0; i < len; i++) { s=s.replace("()","").replace("[]","").replac 阅读全文
摘要:
class Solution { public int[] twoSum(int[] nums, int target) { int[] num = new int[2]; for (int i = 0; i < nums.length; i++) { for (int j = 0; j < num 阅读全文