n = int(input())

i = 1

sum = 0

while(i<n+1) :

sum = sum + i

i = i + 1

print(sum)

First of all u should always format your code properly before posting and give the problem link for which you are asking for help.

If it is what i think it is (sum of first n numbers) then there is a formula for it which gives answer in constant time

The formula is n*(n+1)/2

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