题解

# 生成一个字典
dict = {'name': '','age': '','sex': ''}
# 判断key是否存在于dict中
print('name' in dict)  # 结果返回True
print('id' in dict)  # 结果返回False

Code

from sys import stdin
D={}
_=input()
for line in stdin.readlines():
    S=line.strip().split()
    if S[0]=='I':
        D[int(S[1])]=1
    elif S[0]=='Q':
        if int(S[1]) in D:
            print('Yes')
        else:
            print('No')