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Discussion of Problem 1654. Cipher Message

use printf() instead of cout and string instead of char if you use c++ stl
Posted by Haloom 16 Jun 2018 23:42
i used deque. cout got me TLE.using printf save me.

      if(st.front()!=s[i])
        {
            st.emplace_front(s[i]);
        }
        else
            st.pop_front();


for(it=st.end()-1; it>=st.begin(); it--)
    {
        printf("%c",*it);
    }