#include <bits/stdc++.h>
using namespace std;
int main(){
stack<int> st1;
st1.push(10);
st1.push(20);
stack<int> st2;
st2.emplace(49);
st2.emplace(329);
// before swapping
stack<int> temp1 = st1;
cout << "Stack 1" << endl;
while(!temp1.empty()){
cout << temp1.top() << " ";
temp1.pop();
}
cout << endl << "Stack 2" << endl;
stack<int> temp2 = st2;
while(!temp2.empty()){
cout << temp2.top() << " ";
temp2.pop();
}
st1.swap(st2);
// after swapping
cout << endl << "Stack 1" << endl;
stack<int> swap1 = st1;
while(!swap1.empty()){
cout << swap1.top() << " ";
swap1.pop();
}
cout << endl << "Stack 2" << endl;
stack<int> swap2 = st2;
while(!swap2.empty()){
cout << swap2.top() << " ";
swap2.pop();
}
return 0;
}
