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‎01. Single Number/README.md renamed to ‎001. Single Number/README.md

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‎01. Single Number/main.cpp renamed to ‎001. Single Number/main.cpp

+13-13
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#include <iostream>
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#include "solution.h"
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// Unit Test
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int main()
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{
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Solution s;
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int A[7] = {1,2,3,5,2,1,3};
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std::cout << s.singleNumber(A, 7) << std::endl;
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return 0;
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}
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#include <iostream>
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#include "solution.h"
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// Unit Test
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int main()
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{
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Solution s;
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int A[7] = {1,2,3,5,2,1,3};
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std::cout << s.singleNumber(A, 7) << std::endl;
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return 0;
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}

‎01. Single Number/solution.h renamed to ‎001. Single Number/solution.h

+9-9
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@@ -1,9 +1,9 @@
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class Solution {
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public:
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int singleNumber(int A[], int n) {
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int r{0};
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for (int i = 0; i != n; ++i)
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r ^= A[i];
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return r;
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}
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};
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class Solution {
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public:
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int singleNumber(int A[], int n) {
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int r{0};
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for (int i = 0; i != n; ++i)
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r ^= A[i];
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return r;
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}
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};

‎02. Maximum Depth of Binary Tree/README.md renamed to ‎002. Maximum Depth of Binary Tree/README.md

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‎02. Maximum Depth of Binary Tree/main.cpp renamed to ‎002. Maximum Depth of Binary Tree/main.cpp

+41-41
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@@ -1,41 +1,41 @@
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#include <iostream>
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#include "solution.h"
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// Test Unit
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// Create a tree for test
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// 1
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// / \
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// 2 3
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// / \ \
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// 4 5 6
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// / \
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// 7 8
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// /
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// 9
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int main() {
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TreeNode root(1);
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TreeNode t2(2);
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TreeNode t3(3);
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TreeNode t4(4);
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TreeNode t5(5);
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TreeNode t6(6);
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TreeNode t7(7);
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TreeNode t8(8);
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TreeNode t9(9);
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root.left = &t2;
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root.right = &t3;
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t2.left = &t4;
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t2.right = &t5;
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t3.right = &t6;
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t4.left = &t7;
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t4.right = &t8;
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t8.left = &t9;
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Solution s;
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std::cout << s.maxDepth(&root) << std::endl;
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return 0;
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}
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#include <iostream>
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#include "solution.h"
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// Test Unit
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// Create a tree for test
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// 1
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// / \
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// 2 3
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// / \ \
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// 4 5 6
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// / \
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// 7 8
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// /
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// 9
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int main() {
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TreeNode root(1);
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TreeNode t2(2);
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TreeNode t3(3);
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TreeNode t4(4);
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TreeNode t5(5);
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TreeNode t6(6);
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TreeNode t7(7);
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TreeNode t8(8);
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TreeNode t9(9);
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root.left = &t2;
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root.right = &t3;
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t2.left = &t4;
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t2.right = &t5;
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t3.right = &t6;
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t4.left = &t7;
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t4.right = &t8;
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t8.left = &t9;
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Solution s;
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std::cout << s.maxDepth(&root) << std::endl;
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return 0;
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}

‎02. Maximum Depth of Binary Tree/solution.h renamed to ‎002. Maximum Depth of Binary Tree/solution.h

+23-23
Original file line numberDiff line numberDiff line change
@@ -1,23 +1,23 @@
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/**
2-
* Definition for binary tree
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* struct TreeNode {
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* int val;
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* TreeNode *left;
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* TreeNode *right;
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* TreeNode(int x) : val(x), left(NULL), right(NULL) {}
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* };
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*/
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struct TreeNode {
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int val;
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TreeNode *left;
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TreeNode *right;
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TreeNode(int x) : val(x), left(NULL), right(NULL) {}
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};
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class Solution {
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public:
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int maxDepth(TreeNode *root) {
20-
if (root == NULL) return 0;
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return std::max(maxDepth(root->left), maxDepth(root->right))+1;
22-
}
23-
};
1+
/**
2+
* Definition for binary tree
3+
* struct TreeNode {
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* int val;
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* TreeNode *left;
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* TreeNode *right;
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* TreeNode(int x) : val(x), left(NULL), right(NULL) {}
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* };
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*/
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struct TreeNode {
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int val;
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TreeNode *left;
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TreeNode *right;
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TreeNode(int x) : val(x), left(NULL), right(NULL) {}
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};
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17+
class Solution {
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public:
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int maxDepth(TreeNode *root) {
20+
if (root == NULL) return 0;
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return std::max(maxDepth(root->left), maxDepth(root->right))+1;
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}
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};

‎03. Same Tree/README.md renamed to ‎003. Same Tree/README.md

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‎03. Same Tree/main.cpp renamed to ‎003. Same Tree/main.cpp

+43-43
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@@ -1,43 +1,43 @@
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#include <iostream>
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#include "solution.h"
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// Test Unit
5-
// Create a tree for test
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// 1
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// / \
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// 2 3
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// / \ \
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// 4 5 6
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// / \
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// 7 8
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// /
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// 9
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16-
int main() {
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TreeNode root1(1);
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TreeNode root2(1);
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TreeNode t2(2);
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TreeNode t3(3);
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TreeNode t4(4);
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TreeNode t5(5);
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TreeNode t6(6);
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TreeNode t7(7);
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TreeNode t8(8);
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TreeNode t9(9);
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root1.left = &t2;
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root1.right = &t3;
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root2.left = &t2;
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root2.right = &t3;
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t2.left = &t4;
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t2.right = &t5;
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t3.right = &t6;
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t4.left = &t7;
36-
t4.right = &t8;
37-
t8.left = &t9;
38-
39-
Solution s;
40-
std::cout << s.isSameTree(&root1, &root2) << std::endl;
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42-
return 0;
43-
}
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#include <iostream>
2+
#include "solution.h"
3+
4+
// Test Unit
5+
// Create a tree for test
6+
// 1
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// / \
8+
// 2 3
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// / \ \
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// 4 5 6
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// / \
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// 7 8
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// /
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// 9
15+
16+
int main() {
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TreeNode root1(1);
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TreeNode root2(1);
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TreeNode t2(2);
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TreeNode t3(3);
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TreeNode t4(4);
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TreeNode t5(5);
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TreeNode t6(6);
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TreeNode t7(7);
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TreeNode t8(8);
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TreeNode t9(9);
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root1.left = &t2;
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root1.right = &t3;
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root2.left = &t2;
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root2.right = &t3;
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t2.left = &t4;
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t2.right = &t5;
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t3.right = &t6;
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t4.left = &t7;
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t4.right = &t8;
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t8.left = &t9;
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Solution s;
40+
std::cout << s.isSameTree(&root1, &root2) << std::endl;
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return 0;
43+
}

‎03. Same Tree/solution.h renamed to ‎003. Same Tree/solution.h

+25-25
Original file line numberDiff line numberDiff line change
@@ -1,25 +1,25 @@
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/**
2-
* Definition for binary tree
3-
* struct TreeNode {
4-
* int val;
5-
* TreeNode *left;
6-
* TreeNode *right;
7-
* TreeNode(int x) : val(x), left(NULL), right(NULL) {}
8-
* };
9-
*/
10-
11-
struct TreeNode {
12-
int val;
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TreeNode *left;
14-
TreeNode *right;
15-
TreeNode(int x) : val(x), left(NULL), right(NULL) {}
16-
};
17-
18-
class Solution {
19-
public:
20-
bool isSameTree(TreeNode *p, TreeNode *q) {
21-
if (p && q) return (p->val == q->val) && isSameTree(p->left, q->left) && isSameTree(p->right, q->right);
22-
else if (!p && !q) return true;
23-
else return false;
24-
}
25-
};
1+
/**
2+
* Definition for binary tree
3+
* struct TreeNode {
4+
* int val;
5+
* TreeNode *left;
6+
* TreeNode *right;
7+
* TreeNode(int x) : val(x), left(NULL), right(NULL) {}
8+
* };
9+
*/
10+
11+
struct TreeNode {
12+
int val;
13+
TreeNode *left;
14+
TreeNode *right;
15+
TreeNode(int x) : val(x), left(NULL), right(NULL) {}
16+
};
17+
18+
class Solution {
19+
public:
20+
bool isSameTree(TreeNode *p, TreeNode *q) {
21+
if (p && q) return (p->val == q->val) && isSameTree(p->left, q->left) && isSameTree(p->right, q->right);
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else if (!p && !q) return true;
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else return false;
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}
25+
};

‎04. Reverse Integer/README.md renamed to ‎004. Reverse Integer/README.md

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‎04. Reverse Integer/main.cpp renamed to ‎004. Reverse Integer/main.cpp

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‎04. Reverse Integer/solution.h renamed to ‎004. Reverse Integer/solution.h

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‎05. Best Time to Buy and Sell Stock II/README.md renamed to ‎005. Best Time to Buy and Sell Stock II/README.md

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‎05. Best Time to Buy and Sell Stock II/main.cpp renamed to ‎005. Best Time to Buy and Sell Stock II/main.cpp

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‎05. Best Time to Buy and Sell Stock II/solution.h renamed to ‎005. Best Time to Buy and Sell Stock II/solution.h

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‎06. Unique Binary Search Trees/README.md renamed to ‎006. Unique Binary Search Trees/README.md

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‎06. Unique Binary Search Trees/main.cpp renamed to ‎006. Unique Binary Search Trees/main.cpp

+10-10
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@@ -1,10 +1,10 @@
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#include <iostream>
2-
#include "solution.h"
3-
4-
int main() {
5-
Solution s;
6-
std::cout << s.numTrees(3) << std::endl;
7-
std::cout << s.numTrees(19) << std::endl;
8-
9-
return 0;
10-
}
1+
#include <iostream>
2+
#include "solution.h"
3+
4+
int main() {
5+
Solution s;
6+
std::cout << s.numTrees(3) << std::endl;
7+
std::cout << s.numTrees(19) << std::endl;
8+
9+
return 0;
10+
}

‎06. Unique Binary Search Trees/solution.h renamed to ‎006. Unique Binary Search Trees/solution.h

+11-11
Original file line numberDiff line numberDiff line change
@@ -1,11 +1,11 @@
1-
#include <climits>
2-
3-
class Solution {
4-
public:
5-
int numTrees(int n) {
6-
long long res = 1;
7-
for (int i=1; i<=n; ++i)
8-
res = res*2*(2*i-1)/(i+1);
9-
return res > INT_MAX ? 0 : res;
10-
}
11-
};
1+
#include <climits>
2+
3+
class Solution {
4+
public:
5+
int numTrees(int n) {
6+
long long res = 1;
7+
for (int i=1; i<=n; ++i)
8+
res = res*2*(2*i-1)/(i+1);
9+
return res > INT_MAX ? 0 : res;
10+
}
11+
};

‎07. Linked List Cycle/README.md renamed to ‎007. Linked List Cycle/README.md

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