3331. Find Subtree Sizes After Changes
https://tools.xxooooxx.org/su/aDvpNgZXO
Tag: Tree
class Solution {
public:
void dfs(int pre, int cur, vector<vector<int>> &
3337. Total Characters in String After Transformations II
https://tools.xxooooxx.org/su/Fjc5EwA9u
Tag: Math, Matrix, Quick Pow
typedef long long ll;
class Solution {
public:
ll mod = 1e9 + 7;
vector<vector&
LC 3356. Zero Array Transformation II
https://tools.xxooooxx.org/su/gsxoFYBMP
Tag: Binary Search, Prefix Sum
class Solution {
public:
int minZeroArray(vector<int>& nums, vector<vector&
LC 3363. Find the Maximum Number of Fruits Collected
https://tools.xxooooxx.org/su/VU7TFXpms
Tag: DP
class Solution {
public:
vector<pair<int, int>> dir2 = {{1, -1}, {1, 0}, {1,
LC 3388. Count Beautiful Splits in an Array
https://leetcode.com/problems/count-beautiful-splits-in-an-array/description/
Tag: Hash
typedef long long ll;
class Solution {
public:
vector<ll> preh, preb;
ll mod = 1e9 + 7;