LeetCode #100 SameTree. Algorithm,알고리즘,LeetCode,Codefights,CodeSignal,코드파이트,코드시그널,예제,문제해결능력,example,c++,java,재귀,recursive,datastructure,techinterview,coding,코딩인터뷰,기술면접, dynamicProgramming
술 취해서 제정신 아님,, leetcode compiler 좀 이상한듯?? null 검사 안하면 if 문에서 compile 안돼서 좀 헤멤..
I'm kinda wasted,, and leetcode compiler was weired.. or me?? If i don't check NULL, then it return compiler error,,, in if statement.. Anyway, gotcha!
LeetCode #100
Q.
Given two binary trees, write a function to check if they are the same or not.
입력받은 두개의 바이너리 트리에서, 두 트리가 같은지 확인하는 함수를 짜봐라.
구조가 똑같고, 노드의 값이 같으면 바이너리 트리가 같다고 생각한다.
e.g.
example
Process
// Process
// 2.1. Compare value, left, and right
//3. Return result
// 처리과정
//1. root node 입력받는다.
//2. 전위수식으로 전체 반복한다 (트리)
// 2.1. 값, 좌측 재귀, 우측 재귀 확인한다.
//3. 결과 반환한다.
Code.. lemme see example code!!!
코드.. 예제코드를 보자!!!
class Solution {
public:
bool isSameTree(TreeNode* p, TreeNode* q) {
return isSameTreeRecursive(p, q);
}
private:
bool isSameTreeRecursive(TreeNode* p, TreeNode* q) {
if (p != 0 && q != 0)
if (p->val == q->val && isSameTreeRecursive(p->left, q->left) && isSameTreeRecursive(p->right, q->right))
{
return true;
}
else {}
else {
if (p == 0 && q == 0)
return true;
}
return false;
}
};
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