#1.1
str1 = input("请输入一个人的名字：")
str2 = input("请输入一个国家名字：")
print("世界这么大，{}想去{}看看。".format(str1, str2))

#1.2整数序列求和
n = input("请输入整数N：")
sum = 0
for i in range(int(n)):
    sum += i + 1
print("1到N求和结果：", sum)

#1.3九九乘法表
for i in range(1, 10):
    for j in range(1, i+1):
        print("{}*{}={:2}".format(j, i, i*j), end=' ')
    print(' ')

#1.4计算1！+2！+3！+……+10！的结果
sum, tmp = 0, 1
for i in range(1, 11):
    tmp *= i
    sum += tmp
print("运算结果是：{}".format(sum))

#1.5猴子吃桃问题
n = 1
for i in range(4, 0, -1):
    n = (n+1) << 1  #<<将原数的二进制表示左移一位，相当于原数乘2
print(n)

#1.6健康食谱输出
diet = ['西红柿', '花椰菜', '黄瓜', '牛排', '虾仁']
for x in range(0,5):
    for y in range(0,5):
        if not(x == y):
            print("{}{}".format(diet[x], diet[y]))

#1.7五角星的绘制：绘制一个红色的五角星图形
from turtle import *
fillcolor("red")
begin_fill()
while True:
    forward(200)
    right(144)
    if abs(pos()) < 1:
        break
end_fill()

#1.8太阳花的绘制
from turtle import *
color('red', 'yellow')
begin_fill()
while True:
    forward(200)
    left(170)
    if abs(pos()) < 1:
        break
end_fill()
done()