Given a binary tree, return the level order traversal of its nodes values. (ie, from left to right, level by level). For example:Given binary tree {3,9,20,#,#,15,7}, 3/ \9 20/ \15 7 return its level order traversal as: [[3],[9,20],[15,7]
] BFS解题思路&…
1.while循环
age_of_sy18
guess_ageinput("guess age:")
count0
while count<3:
if guess_ageage_of_sy:
print("yes,you are right!")
break
elif guess_age
print("think it bigger")
else:
print("think it smaller")
count1
if…