num=int(input())
# 规律。等差数列，d=2
a1=1
an=1+(num-1)*2

# m个连续奇数的起始数字为
sum1=0
for i in range(num):
    sum1=sum1+i
num1=1+(sum1+1-1)*2

# m个连续奇数，值分别存储在list1中
list1=[]
for i in range(sum1+1,sum1+num+1):
    temp=1+(i-1)*2
    list1.append(temp)

# m个连续奇数拼接后输出
str1=str(list1[0])
for i in list1[1:]:
    str1=str1+'+'+str(i)
print(str1)