Help, give me test,please.
My code,it worked for every test, but WA6:
#include "iostream"
#include "stdio.h"
#include "deque"
#include "string"

using namespace std;


int main()
{
std::deque<char> deq(0);

    std::string line;
    std::getline(std::cin, line);
    for (int i= 0; i < line.size(); i++)
    {
        deq.push_back (line[i]);
    }
    deque<char>::size_type sz = deq.size();
    for (int i=0; i<sz; i++)
    {
            if (i+1 != sz)
            {
                if (deq[i] == deq[i+1])
                {
                    deq.erase(deq.begin()+i,deq.begin()+(i+2));
                    if (i>0) i -=2;

                    sz = deq.size();
                    continue;
                }
            }
            else if ((i-1)!=-1)
            {
                if (deq[i-1] == deq[i])
                {
                    deq.erase(deq.begin()+i-1,deq.begin()+(i+1));
                    if (i>0) i -=2;

                    sz = deq.size();
                    continue;
                }

            }

    }
  for (int i=0; i<deq.size(); i++)
      cout <<  deq[i];
  cout << endl;
return 0;
}