# name = 'Tom'
# age = 36
# print('My name is' ,name + '.','I am',age, 'years old.' )
# print('My name is ' + name + '. ' + 'I am '+ str(age) + ' years old.' )
# print('My name is' ,name + '.','I am',age, 'years old.' ,sep='**')
# print(f'My name is {name} I\'m {age:<6} years old.')
# print(f'My name is {name} I\'m {age:>6} years old.')
# s = 10.14159
# print(f'我的月薪${s:.2f}萬')
# for i in range(2,10):
# for j in range(2,10):
# # print(i,'*',j,'=',i*j)
# print(f'{j}*{i}={i*j:>2}',end=' ')
# print()
# q29
# a,b = map(int,input().split())
# s = 0
# for i in range(a,b+1):
# if i == b:
# print(i,end='=')
# else:
# print(i,end='+')
# s = s + i
# print(s)
# q30
# a,b = map(int,input().split())
# s = 0
# if b>=a:
# for i in range(a,b+1):
# if i == b:
# print(i,end='=')
# else:
# print(i,end='+')
# s = s + i
# else:
# for i in range(a,b-1,-1):
# if i == b:
# print(i,end='=')
# else:
# print(i,end='+')
# s = s + i
# print(s)
#Q27
# n = 5
# for i in range(n,-1,-1):
# print(i,end=' ')
#Q26
# n = 3
# for i in range(n):
# print('I love you.')
#q25
# d = input()
# print(d[::-1])
# Q24
d = '12345'
s = 0
for i in d:
s = s + int(i)
print(s)