ben

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114题直接先序遍历也行吧 ``` class Solution { public: TreeNode *pre = nullptr; void flatten(TreeNode* root) { if (root == nullptr) return; auto l = root->left; auto r = root->right; if (pre) {...

there is a code block ```cpp #ifdef TINYXML2_DEBUG if ( !hadError ) { TIXMLASSERT( _elementPool.CurrentAllocs() == _elementPool.Untracked() ); TIXMLASSERT( _attributePool.CurrentAllocs() == _attributePool.Untracked() ); TIXMLASSERT( _textPool.CurrentAllocs() == _textPool.Untracked() ); TIXMLASSERT( _commentPool.CurrentAllocs()...

I added a new one, pls help to check, i have tested for it.

有大佬解释一下这里模拟程序为什么能使用宿主操作系统提供的系统调用吗

我弄了个docker镜像,不想重新配一遍的话可以用一下 `docker pull dinghao188/rcore-tutorial`

> @zeyuanj @dinghao188 请问这个 dinghao188/rcore-tutorial 的dockerfile 在哪里? 发到这了 https://github.com/dinghao188/rcore-tutorial-v3-docker; 这个里面的rust是最小化安装的