我的单调队列被单调队列了

#include<bits/stdc++.h>
using namespace std;
int n,k,a[1000100];
deque<int> q;
int main(){
    //ios::sync_with_stdio(0);
    //cin.tie(0);
    //cout.tie(0);
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	for(int i=1;i<=n;i++){
		while(!q.empty()&&q.front()+k<=i) q.pop_front();
		while(!q.empty()&&a[q.back()]>=a[i]) q.pop_back();
		q.push_back(i);
		cout<<a[q.front()]<<" ";
	}
    return 0;
}