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| author | crupest <crupest@outlook.com> | 2020-08-26 23:26:41 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2020-08-26 23:26:41 +0800 |
| commit | 4c473d407c39bb6cfae9e07e6bcb36a47b014b70 (patch) | |
| tree | 33357454858fafdae1e3f3eec4e849652fbb91ea /works/solutions/cpp/101.cpp | |
| parent | adfa26f487b134979f95a53cfa1b0fde6eab5921 (diff) | |
| download | crupest-4c473d407c39bb6cfae9e07e6bcb36a47b014b70.tar.gz crupest-4c473d407c39bb6cfae9e07e6bcb36a47b014b70.tar.bz2 crupest-4c473d407c39bb6cfae9e07e6bcb36a47b014b70.zip | |
import(solutions): Add problem 101 .
Diffstat (limited to 'works/solutions/cpp/101.cpp')
| -rw-r--r-- | works/solutions/cpp/101.cpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/works/solutions/cpp/101.cpp b/works/solutions/cpp/101.cpp new file mode 100644 index 0000000..a1dad6f --- /dev/null +++ b/works/solutions/cpp/101.cpp @@ -0,0 +1,43 @@ +#include <cstddef>
+
+struct TreeNode
+{
+ int val;
+ TreeNode *left;
+ TreeNode *right;
+ TreeNode(int x) : val(x), left(NULL), right(NULL) {}
+};
+
+class Solution
+{
+public:
+ static bool check(TreeNode *left, TreeNode *right)
+ {
+ if (left == NULL)
+ {
+ if (right == NULL)
+ return true;
+ else
+ return false;
+ }
+ else
+ {
+ if (right == NULL)
+ return false;
+ else
+ {
+ if (left->val != right->val)
+ return false;
+ return check(left->left, right->right) && check(left->right, right->left);
+ }
+ }
+ }
+
+ bool isSymmetric(TreeNode *root)
+ {
+ if (root == nullptr)
+ return true;
+
+ return check(root->left, root->right);
+ }
+};
|