a = 0
while a < 10:
 a +=1 
 if a == 7:
  continue
 print(a)

a = 0
b = 1
while b <= 100:
 a = a + b
 b += 1
print(a)

a = 0
for i in range(101):
  a = a + i
  print(a)

a = 0
while a <= 100:
 a += 1
 if(a%2) == 0:
  print(a)

a = 0
while a <= 100:
  a += 1
  if(a%2) == 0:
    print(a-2+1)

a = 0
while a <= 99:
  a += 1
  if(a%2) != 0:
    print(a)

a = 0
b = 0
while a < 99:
  a += 1
  if a%2 == 1:
   b += a
  else:
   b -= a
print(b)

a = 0
while a < 3:
  name = input("请输入用户名： ")
  password = input("请输入密码: ")
  a += 1
  if name == 'wxd' and password == '123456':
      print("登陆成功")
      exit()
  else:
    print("输入错误，请重新输入")
print("输入错误三次，退出")