int main() {
IntStack s;
s.push(1);
s.push(2);
s.push(3);
s.clear();
s.top();
s.pop();
return 0;
}
int main()
{
IntStack intStack;
intStack.push(1);
intStack.push(2);
intStack.push(3);
while (!intStack.empty())
{
int t = intStack.top();
intStack.pop();
printf("%d\n", t);
}
intStack.push(4);
intStack.push(5);
while (!intStack.empty())
{
int t = intStack.top();
intStack.pop();
printf("%d\n", t);
}
return 0;
}
int main()
{
IntStack stack;
while(true)
{
string cmd;
cin >> cmd;
if(cmd == "push")
{
int elem;
cin >> elem;
stack.push(elem);
}
if(cmd == "pop")
{
stack.pop();
}
if(cmd == "top")
{
cout << stack.top() << " is at the top" << endl;
}
cout << stack << endl;
}
