小苹果改编问题

#include <bits/stdc++.h>
using namespace std;
int main(){int n,x,s_x;cin>>n>>x;int a[n],b[n];for(int i=0;i<n;i++){a[i]=i+1;}int j=0,t,d=0;int s=0;while(n){t=0;s++;cout<<"小苞第"<<s<<"天拿走了编号为";for(int i=0;i<n;i+=3){cout<<a[i]<<" ";if(a[i]==x){s_x=s;}a[i]=0;t++;}cout<<"的苹果"<<endl;j=0;d=0;for(int i=0;i<n;i++){if(a[i]!=0){b[j]=a[i];j++;a[d]=b[d];d++;}}n-=t;}cout<<endl<<"编号为"<<x<<"的苹果，在第"<<s_x<<"天被拿走!";return 0;
}