为什么都是STLdeque，我却TLE了两个点，蒟蒻求救

#include<bits/stdc++.h>
#define N 2000001
using namespace std;

deque <int> dq;
deque <int> dq2;
int a[N],k,d[N],top;

void tj2(int x)
{
    while(!dq2.empty()&&a[dq2.back()]>a[x])
    {
        dq2.pop_back();
    }

    while(!dq2.empty()&&x-dq2.front()>=k) 
    {
        dq2.pop_front();
    }
    dq2.push_back(x);
}

void tj(int x)
{
    while(!dq.empty()&&a[dq.back()]<a[x])
    {
        dq.pop_back();
    }

    while(!dq.empty()&&x-dq.front()>=k) 
    {
        dq.pop_front();
    }
    dq.push_back(x);
}

int main()
{
    int n;
    cin>>n>>k;
    for(int i=0;i<n;i++)
    {
        cin>>a[i];
        tj(i);
        tj2(i);
        if(i>=k-1)
        {
            cout<<a[dq2.front()]<<" ";
            d[top++]=a[dq.front()];
        }   
    }
    cout<<endl;
    for(int i=0;i<top;i++)
        cout<<d[i]<<" ";
    return 0;   
}