LASTDIG  The last digit
Nestor was doing the work of his math class about three days but he is tired of make operations a lot and he should deliver his task tomorrow. His math’s teacher gives him two numbers a and b. The problem consist of finding the last digit of the potency of base a and index b. Help Nestor with his problem. You are given two integer numbers: the base a (0 <= a <= 20) and the index b (0 <= b <= 2,147,483,000), a and b both are not 0. You have to find the last digit of a^{b}.
Input
The first line of input contains an integer t, the number of test cases (t <= 30). t test cases follow. For each test case will appear a and b separated by space.
Output
For each test case output an integer per line representing the result.
Example
Input: 2 3 10 6 2
Output: 9 6
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sas1905:
20160915 14:54:29
4 lines code in Java..:) 

mat_79:
20160912 14:33:26
Java has special function to do it well ;) 

shamimice03:
20160826 14:12:20
oka AC :) ... i use big mod algorithm for that :)


shamimice03:
20160826 13:24:59
is it a big mod realted problem? 

narutohokage_1:
20160811 11:14:29
each character is one byte even if it is space. Delete spaces or shorten your variable name . File Size Will BE LESS THAN 700 BYTES. 

narutohokage_1:
20160811 11:10:36
Nice Question. 

narutohokage_1:
20160811 11:10:19
@vaibhavahuja Try 2 4 (2^4) answer should be 6. If it comes 1 then the mistake you are doing is you take remainder of power divided by 4 . Power%4 but if power is multiple of 4 then power%4 will come to zero so it will always output answer 1 . Check it cost be one wrong answer due to this mistake 

narutohokage_1:
20160811 11:03:52
Test Cases


narutohokage_1:
20160811 11:02:14
Too easy , no need of any technique. Just Check That "2 4" is showing correct as 4%4 = 0 so if you used this approach it will show 2^4 last digit 1 but it is 6. So if pow = multiple of 4 . Then pow%4 == 0 so if pow%4 = 0 change it to 4 then it will show correct answer cost me one wrong answer. 

Kartik Singh:
20160810 20:16:26
Last edit: 20160810 20:16:53 
Added by:  Jose Daniel Rodriguez Morales 
Date:  20081201 
Time limit:  0.340s 
Source limit:  700B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All 
Resource:  Own 