# Please make sure to check Indentation if code shows error
    a = []
    d = ""
    n = int(input())
    for x in range(1,n+1) :
        a.append(x)
    for b in a :
        c = str(b)
        d += c
    print(d)

# Code credit :- Akshat Jain  
# HackerRank Link :- https://www.hackerrank.com/akshat_jjain?hr_r=1
