import sys

print("请输入您的名字：")
name = sys.stdin.readline()
print("您好，" + name)

import sys

print("请输入三个数字，用空格分隔：")
nums = sys.stdin.readline().split()
sum = 0

for num in nums:
    sum += int(num)

print("这三个数字的和为：" + str(sum))

import sys

print("请输入一句话：")
sentence = sys.stdin.readline().strip()
words = sentence.split()

print("单词个数为：" + str(len(words)))

import sys

print("请输入一组数字，用空格分隔：")
nums = sys.stdin.readline().split()
total = 0

for num in nums:
    total += int(num)

average = total / len(nums)
print("这组数字的平均值为：" + str(average))