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Name |
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Your update function.
Instead of
if(s==idx)
Write
if(s==e)
and you should be good to go.Just the statement
if(s==idx)
doesn't check if it's a leaf node as well, so it will modify every time a segment tree node starts with 's'.Test case, in case you want to see a difference:
2 )) 2 1 0
Your code outputs NO, after changing to
s==e
, it outputs YES, answer is YES.