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// constructing stacks
#include <iostream>
#include <vector>
#include <deque>
#include <stack>
using namespace std;
int main ()
{
deque<int> mydeque (3,100); // deque with 3 elements
vector<int> myvector (2,200); // vector with 2 elements
stack<int> first; // empty stack
stack<int> second (mydeque); // stack initialized to copy of deque
stack<int,vector<int> > third; // empty stack using vector
stack<int,vector<int> > fourth (myvector);
cout << "size of first: " << (int) first.size() << endl;
cout << "size of second: " << (int) second.size() << endl;
cout << "size of third: " << (int) third.size() << endl;
cout << "size of fourth: " << (int) fourth.size() << endl;
return 0;
}
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