#include <iostream>
#include <array>
#include <vector>
using namespace std;
int main() {
array<int,5> intarr = {1,2,3,4,5};
// traverse
for(int a : intarr){
cout << a*2 << " ";
}
for(int& a : intarr){
cout << a << " ";
}
for(int& a : intarr){
cout << a*2 << " ";
}
// sort
// input from start
vector<int> arr = {100,200,300};
arr.insert(arr.begin(),1000);
cout<<arr[0] << " ";
// input at last
arr.insert(arr.end(),2000); // or push_back/emblece_back
cout<<arr[arr.size()-1] <<" ";
// input at any instance
arr.insert(arr.begin()+1,3000);
cout<<arr[1] <<" ";
// delete at start
arr.erase(arr.begin());
// delete at end
arr.erase(arr.end());
// delete at any instance
arr.erase(arr.begin()+1);
// search via instance
intarr[0] = 1;
return 0;
}
