HEY THIS IS MY SOLTUION . PLS HELP ME TO FIND WHY ITS SHOWING RUNTIME ERROR
https://www.codechef.com/viewsolution/47197553
You are getting runtime error because for N == 1 you are printing the answer 0 and not taking the input for K queries at all. Also in case N==1, the answer 0 should be printed a total of K times. 
P.S : You can tag me in a comment under official editorial of the problem (that way relevant discussions remain at one place), no need to create a new Discuss post !!
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thankyou!.. it working now