#include<iostream>
#include<vector>
using namespace std;
int main()
{
vector<int> v;
v.push_back(1);
v.push_back(2);
v.push_back(3);
v.push_back(4);
v.erase(v.begin()+1,v.begin()+3);
for(int val : v)
{
cout<<val<<" ";
}
// cout<<v.size()<<endl;
}
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