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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 | 1320a082dab71eec15e86eaa651f2cdd62b60073 (patch) | |
| tree | f9ef64e70d77646919d9beb5d3150bdbea690778 | |
| parent | 4abb79cfc9d7eeb702cff25cb66e922d4b9aa53d (diff) | |
| download | solutions-1320a082dab71eec15e86eaa651f2cdd62b60073.tar.gz solutions-1320a082dab71eec15e86eaa651f2cdd62b60073.tar.bz2 solutions-1320a082dab71eec15e86eaa651f2cdd62b60073.zip | |
Add problem 101 .
| -rw-r--r-- | cpp/101.cpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/cpp/101.cpp b/cpp/101.cpp new file mode 100644 index 0000000..a1dad6f --- /dev/null +++ b/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);
+ }
+};
|