Given an array A consisting of n integers , we define beauty of the array as maximum sum of some contiguous elements with performing atmost one operation which is , you can multiply any subarray with ‘x’ but only once.
N=5,x=-2
A=[-3,8,-2,1,-6]
ans:- 22
sir / mam , couldnt even approach the question ., it is given in the quiz
hello @somilgupta4
multiply the subarray
-2 1 -6 by x
u get
-3 8 4 -2 12
take the sum of
8 4 -2 12
which is 22
that is the answer
the approach is simple, u need to find subarray with minimum sum if x is -ve and multiply that with x
if x is positive find subarray with maximum sum and multiply x with that
handle separately for -1 1 and 0
yes sir i knew the answer , but i knw kadane would be applied but how i dont know
because there would be two cases
first apply simple kadane to find the max sum subarray say s1,
now find the min sum sub array again with the help of kadane (how? just flip the sign of the numbers and then apply kadane whatever answer come take its negative) say2
now answer will be
max(s1,s2,x* s1,x* s2)
refer this for dp solution
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