题目
从左下为起点进行二分查找
当前坐标值小于target向右找
当前坐标值大于target向上找
public boolean findNumberIn2DArray(int[][] matrix, int target) {
int i = matrix.length - 1;
int j = 0;
while (i >= 0 && j < matrix[0].length){
if (matrix[i][j] == target) return true;
if (matrix[i][j] > target) i--;
else j++;
}
return false;
}