思路
class Solution {
public:
bool findNumberIn2DArray(vector>& matrix, int target) {
int j = 0, i = matrix.size()-1;
while(i>=0&&jtarget) i--;
else if(matrix[i][j]
Python
class Solution:
def findNumberIn2DArray(self, matrix: List[List[int]], target: int) -> bool:
i, j = len(matrix)-1, 0
while i>=0 and jtarget: i-=1
elif matrix[i][j] 
