# year=int(input())
# if(year%4==0)&(year%100!=0):
#     print("'%d'是闰年"%year)
# elif(year%400==0):
#     print("'%d'是闰年"%year)
# else:
#     print("'%d'不是闰年"%year)

# x=int(input())
# y=int()
# if(x<0):
#     y=0
# elif(x>=0)&(x<5):
#     y=x;
# elif(x>=5)&(x<10):
#     y=3*x-5
# elif(x>=10)&(x<20):
#     y=0.5*x-2
# else:
#     y=0
# print(y)

# str1=str(input(''))
# a=str1.count('-')
# b=str1[1]
# if a==0:
#     print('第一象限')
# elif a==2:
#     print('第三象限')
# else:
#     if b=='-':
#         print('第二象限')
#     else:
#         print('第四象限')

# per_num=int(input())
# sta_num=int(input())
#
# if per_num<=0 or sta_num<=0:
#     print("error")
# else:
#     if 1<=sta_num<=4:
#         pm=3
#     if 5<=sta_num<=9:
#         pm=4
#     if sta_num>9:
#         pm=5
#     count=pm*per_num
#     print(count)

# lst=list(input('请输入一行字符：'))
# a=0
# b=0
# c=0
# d=0
# for i in range(len(lst)):
#     if ord(lst[i]) in range(65, 91):
#         a+=1
#     elif ord(lst[i]) in range(97, 123):
#         b+=1
#     elif ord(lst[i]) in range(48, 58):
#         c+=1
#     else:
#         d+=1
# print('大写字母个数：%s' %a)
# print('小写字母个数：%s' %b)
# print('数字个数：%s' %c)
# print('其它字符个数：%s'%d)

# s=int(input("请输入一个正整数："))
# if s<2:
#     print("这个数不是素数！")
# else:
#     for i in range(2,s):
#         if s%i==0:
#             print("这个数不是素数！")
#             break
#     else:
#         print("这个数是素数！")

# for y in range(1,10):
#    for x in range(1,y+1):
#       r=x*y
#       print(x,'*',y,'=',r,' ',end='')
#    print("\n")

# i=1
# sum=0
# while(i<=100):
#     sum+=i
#     i+=1
# print(sum)