Given a number n. Find the last two digits of 5 ^ n ( 5 to the power of n ). Remember that overflow can occur.

2<=N<=2.1018

Can anyone explain why the answer will always be 25 for this question.

Link to the question

https://www.codechef.com/CMR12121/problems/DGLST

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for n>=2

last two digits of 5^n will always be 25.

for n==1

its 5

Can value of N be 2.1018 ? then ans will be 29.45

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N is always an integer

Continuing the discussion from DIGIT LAST (code mate round 1):

Here it is given 2<=N<=2.1018

So it cannot be said that N is an integer only.

what I believe is that range is **not** 2<=N<=2.1018 but 2<=N<=2*10^18 … a typing error in constraints

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