Condition in 2nd iteration

#1

Code is:
for(;i<n;i++)
{
while((!q.empty() && (q.front() <= i-k))…
}

doubt: What is the logic behind writing q.front() <= i-k, I mean to ask that q.front() will be a value and we are comparing value to index/position…why???

#2

hello @acharyadhwanan29
In deque we are storing index only.

in the condition q.front() <= i-k
we are popping out all indices from deque whose value <=i-k .

#3

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