=====Problem Statement=====
The included code stub will read an integer, n, from STDIN.
Without using any string methods, try to print the following:
123...n
Note that "" represents the consecutive values in between.
=====Example=====
n = 5
Print the string 12345.
=====Input Format=====
The first line contains an integer n.
=====Constraints=====
1≤n≤150
=====Output Format=====
Print the list of integers from 1 through n as a string, without spaces.
n=int(input())
ar=range(1,n+1)
for i in ar:
    print(i,end="")

n=int(input())
ar=range(1,n+1)
for i in ar:
    print(i,end="")
