求助，为什么WA

#include<bits/stdc++.h>
using namespace std;
struct Node{
    int Data,Address;
}Maxn[1000010],Minn[1000010];
Node x,k;
int n,m,Front_Max,Back_Max,Front_Min,Back_Min,Ans_Max[1000100],Ans_Min[1000100];
template <typename T>
int Read(T &x) {
    x=0;
    int f=1;
    char c=getchar();
    for(; !isdigit(c); c=getchar()) if(c=='-') f=-f;
    for(; isdigit(c); c=getchar()) x=x*10+c-'0';
    x*=f;
    if(c=='\n')return 1;
    else return 0;
}
void Write(long long x)
{
    if(x<0){
        putchar('-');
        x=-x;
    } 
    if(x>9){
        Write((x-x%10)/10);
     }
    putchar(x%10+'0');
}
int main(){
    Read(n);
    Read(m);
    Front_Max=Back_Max=Front_Min=Front_Min=1;
    for(int i=1;i<m;i++){
        Read(x.Data);
        x.Address=i;
        while((Maxn[Front_Max].Data<=x.Data)&&(Front_Max<=Back_Max))
            Back_Max--;
        Maxn[++Back_Max]=x;
        while((Minn[Front_Min].Data>=x.Data)&&(Front_Min<=Back_Min))
            Back_Min--;
        Minn[++Back_Min]=x; 
    }
    for(int i=m;i<=n;i++){
        Read(x.Data);
        x.Address=i;
        while((Maxn[Back_Max].Data<=x.Data)&&(Front_Max<=Back_Max))
            Back_Max--;
        Maxn[++Back_Max]=x;
        while((Minn[Back_Min].Data>=x.Data)&&(Front_Min<=Back_Min))
            Back_Min--;
        Minn[++Back_Min]=x;
        while((Maxn[Front_Max].Address<=i-m)&&(Front_Max<=Back_Max))
            Front_Max++;
        while((Minn[Front_Min].Address<=i-m)&&(Front_Min<=Back_Min))
            Front_Min++;
        Ans_Max[i-m]=Maxn[Front_Max].Data;
        Ans_Min[i-m]=Minn[Front_Min].Data;      
    }
    for(int i=0;i<n-m;i++){
        Write(Ans_Min[i]);
        putchar(' ');
    }
    Write(Ans_Min[n-m]);
        putchar('\n');
    for(int i=0;i<n-m;i++){
        Write(Ans_Max[i]);
        putchar(' ');
    }
    Write(Ans_Max[n-m]);
        putchar('\n');  
    return 0;
}