leetcode

Solution to some Leetcode problems written in C++
git clone git://git.dimitrijedobrota.com/leetcode.git
Log | Files | Refs | README | LICENSE
commit 2231d61cbb2d0e5894bbb3ee04c8cb1194453a3b
parent ec6d4815de18f268837c49c4804d9964b2b005cb
author Dimitrije Dobrota < mail@dimitrijedobrota.com >
date Sun, 23 Jul 2023 18:02:17 +0200

Daily Problem

Diffstat:
A Problems/0894.cpp | +++++++++++++++++++++++++++++++++++
M README.md | +

2 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/ Problems/0894.cpp b/ Problems/0894.cpp

@@ -0,0 +1,35 @@

class Solution {
TreeNode *duplicate(TreeNode *root) {
TreeNode *dup = new TreeNode(root->val);
if (root->left) dup->left = duplicate(root->left);
if (root->right) dup->right = duplicate(root->right);
return dup;
}

vector<TreeNode *> dp[20];

public:
vector<TreeNode *> allPossibleFBT(int n) {
if (n % 2 == 0) return {};
if (1 == n) return {new TreeNode(0)};

if (!dp[n].empty()) return dp[n];

vector<TreeNode *> ret;
for (int i = 2; i <= n; i += 2) {
auto left = allPossibleFBT(i - 1);
auto right = allPossibleFBT(n - i);
for (int l = 0; l < left.size(); l++) {
for (int r = 0; r < right.size(); r++) {
ret.push_back(new TreeNode(0));
ret.back()->left =
(r == right.size() - 1) ? left[l] : duplicate(left[l]);
ret.back()->right =
(l == left.size() - 1) ? right[r] : duplicate(right[r]);
}
}
}

return dp[n] = ret;
}
};

diff --git a/ README.md b/ README.md

@@ -376,6 +376,7 @@ for solving problems.

| 0881 | Medium | [Boats to Save People](Problems/0881.cpp) |
| 0884 | Easy | [Uncommon Words from Two Sentences](Problems/0884.cpp) |
| 0886 | Medium | [Possible Bipartition](Problems/0886.cpp) |
| 0894 | Medium | [All Possible Full Binary Trees](Problems/0894.cpp) |
| 0897 | Easy | [Increasing Order Search Tree](Problems/0897.cpp) |
| 0901 | Medium | [Online Stock Span](Problems/0901.cpp) |
| 0904 | Medium | [Fruit Into Baskets](Problems/0904.cpp) |