# -*- coding: utf-8 -*-
"""
Created on Mon Sep 14 15:20:00 2020

@author: Sim
"""
# fortest2.py
n = int(input("Value of n: "))

sum = 0
for i in range(1, n+1):
    sum = sum + i

print("sum 1 to ", n, "is ", sum)


# range test

n=5
for i in range(0, n): 
    print(i)
for i in range(n):
    print(i)
for i in range(0,n,2):
    print(i)