#include <iostream>
#include <vector>
using namespace std;

void printMe(vector<int>& v){ for(auto &i:v) cout<<i<<" "; cout<<"\n"; }

int main() {
	vector<int> c = { 1,2,3,4,5,6,7,8};
	printMe(c);
	c.erase(c.begin());
	printMe(c);
	c.erase(c.begin());
	printMe(c);
	c.erase(c.end()-1);
	printMe(c);
	return 0;
}