Question

Jaroor mai aapka friend banunga @rinkubiswasbegopra
mere account pe jaake message toh karo​

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How to attempt?

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Adam's Charity

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Adam decides to be generous and do some charity. Starting today, from day 1

until day n, he gives il coins to charity on day 'i' (1 <=i<= n).

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Return the total coins he would give to charity.

Input Specification:

input1: Number of days of charity

Output Specification:

Return the total number of coins till charity days.

Example 1: