ARST打卡第31周[31/521]

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

class Solution {
// 测试一发发现傻逼了自己，NULL在c++里面是0，和java里面的Integer对象中的NULL不是一样的！我傻逼了
public:
  // 对于边界值有两种处理方式,1. 设置更大的界限,不过这样显然是找到的数据的bug
  // 所以我采用第二种方式,就是利用 二叉搜索树 不会有重复值的性质去 取代之前的>=,<=,这样就不会受限了
    // set<int> s;// 20ms
    unordered_set<int> s;// 16ms

    bool solve(TreeNode *root,int min,int max){
      if(root == NULL) return true;
      int val = root->val;
      if(s.find(val)!=s.end()) return false;
      else s.insert(val);
      // 这里会wa在`[2147483647]` if(min>=val) return false;
      // 凡是遍历下来的，一定有父亲，所以其实只要特判一手单根树就行了！
      // [1,null,1] 右边遍历也不是跟左边的孩子比较，都是和父亲比较！！ if(root->left!=NULL && min>=val) return false;
      if(min>val) return false;
      // 这里会wa在`[1,1]` 因为右边不是跟右孩子比较！ if(root->right!=NULL && max<=val) return false;
      if(max<val) return false;
      // 遍历左边的时候，右边的最大一直保持val
      // 遍历右边的时候，左边的最小一直保持val，所以就保持了性质
      return solve(root->left,min,val) && solve(root->right,val,max);
    }

    bool isValidBST(TreeNode* root) {
      if(root == NULL || (root->left == NULL && root->right == NULL) ) return true;
      return solve(root,INT_MIN,INT_MAX);
    }
};

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54

单林敏@DESKTOP-A7T3V67 MINGW64 ~/Desktop/Blog (master)
$ git filter-branch --force --index-filter 'git rm --cached -r --ignore-unmatch 生活/微信备份/8月13-11月19与昭\(夹34其他\)/android_eda93ed7432c852f294c0f6c71fb3352/ && git rm --cached -r Latex/' --prune-empty --tag-name-filter cat -- --all
Rewrite 67c9d71d4e60028c54451053e4d0eb6e733b7586 (1/96) (1 seconds passed, remaining 95 predicted)    fatal: pathspec 'Latex/' did not match any files
index filter failed: git rm --cached -r --ignore-unmatch 生活/微信备份/8月13-11月19与昭\(夹34其他\)/android_eda93ed7432c852f294c0f6c71fb3352/ && git rm --cached -r Latex/

单林敏@DESKTOP-A7T3V67 MINGW64 ~/Desktop/Blog (master)
$ git filter-branch --force --index-filter 'git rm --cached -r Latex/' --prune-empty --tag-name-filter cat -- --all                                                       Rewrite 67c9d71d4e60028c54451053e4d0eb6e733b7586 (1/96) (0 seconds passed, remaining 0 predicted)    fatal: pathspec 'Latex/' did not match any files
index filter failed: git rm --cached -r Latex/

单林敏@DESKTOP-A7T3V67 MINGW64 ~/Desktop/Blog (master)
$ git filter-branch --force --index-filter 'git rm --cached --ignore-unmatch 生活/微信备份/8月13-11月19与昭\(夹34其他\)/android_eda93ed7432c852f294c0f6c71fb3352/BAK_0_MEDIA' --prune-empty --tag-name-filter cat -- --all
Rewrite 3279ddb863731866633999b43860045b1c0ceb05 (93/96) (64 seconds passed, remaining 2 predicted)    rm '生活/微信备份/8月13-11月19与昭(夹34其他)/android_eda93ed7432c852f294c0f6c71fb3352/BAK_0_MEDIA'
Rewrite 2f64cd075e37f29a8559d7bbd8282d0b70bea117 (95/96) (66 seconds passed, remaining 0 predicted)
Ref 'refs/heads/master' was rewritten
WARNING: Ref 'refs/remotes/wolfdan.cn/master' is unchanged

单林敏@DESKTOP-A7T3V67 MINGW64 ~/Desktop/Blog (master)
$ git push  wolfdan.cn master --force --all
fatal: --all can't be combined with refspecs

单林敏@DESKTOP-A7T3V67 MINGW64 ~/Desktop/Blog (master)
$ git push  wolfdan.cn master --force
Enumerating objects: 26, done.
Counting objects: 100% (26/26), done.
Delta compression using up to 8 threads
Compressing objects: 100% (20/20), done.
Writing objects: 100% (22/22), 6.41 MiB | 584.00 KiB/s, done.
Total 22 (delta 6), reused 10 (delta 1)
remote: Checking connectivity: 22, done.
remote: Powered by GITEE.COM [GNK-3.8]
To gitee.com:wolfdan/wolfdan.cn.git
   a21c409..50fecff  master -> master

单林敏@DESKTOP-A7T3V67 MINGW64 ~/Desktop/Blog (master)
$ git filter-branch --force --index-filter 'git rm --cached --ignore-unmatch -rf 生活/微信备份/' --prune-empty --tag-name-filter cat -- --all                             Rewrite 7eadb383a4da06293c8c6f8cd38da878221d00de (93/96) (63 seconds passed, remaining 2 predicted)    rm '生活/微信备份/8月13-11月19与昭(夹34其他)/android_eda93ed7432c852f294c0f6c71fb3352/BAK_0_TEXT'
rm '生活/微信备份/8月13-11月19与昭(夹34其他)/android_eda93ed7432c852f294c0f6c71fb3352/Backup.db'
Rewrite 50fecff951f7eb6e8a8a908594d06f448ce1e873 (95/96) (64 seconds passed, remaining 0 predicted)
Ref 'refs/heads/master' was rewritten
Ref 'refs/remotes/wolfdan.cn/master' was rewritten

单林敏@DESKTOP-A7T3V67 MINGW64 ~/Desktop/Blog (master)
$ rm -rf .git/refs/original/

单林敏@DESKTOP-A7T3V67 MINGW64 ~/Desktop/Blog (master)
$ git reflog expire --expire=now --all

单林敏@DESKTOP-A7T3V67 MINGW64 ~/Desktop/Blog (master)
$ git gc --prune=now
Enumerating objects: 1401, done.
Counting objects: 100% (1401/1401), done.
Delta compression using up to 8 threads
Compressing objects: 100% (1068/1068), done.
Writing objects: 100% (1401/1401), done.
Total 1401 (delta 302), reused 1396 (delta 301)