平移数据(容器)

#include <bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	int a1[n];
	for(int i=0;i<n;i++){
		cin>>a1[i];
	}
	vector<int> a(a1,a1+sizeof(a1)/sizeof(int));
	int b=a[0];
	a.erase(a.begin());
	a.insert(a.end(),b);
	cout<<b<<endl;
	for(int i=0;i<a.size();i++){
		cout<<a[i]<<" ";
	}
	return 0;
}