/in/foo.cc: In function 'int main()':
/in/foo.cc:15:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i=0;i<st.size();i++)
                ~^~~~~~~~~~
/in/foo.cc:36:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<tmp.size();i++)
               ~^~~~~~~~~~~
/in/foo.cc:48:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<st.size()-m+1;i++)
               ~^~~~~~~~~~~~~~
/in/foo.cc:58:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i=0;i<st.size()-t*m;i++)
                ~^~~~~~~~~~~~~~
/in/foo.cc:69:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<st.size();i++)
               ~^~~~~~~~~~
/in/foo.cc:87:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<tmp.size();i++)
               ~^~~~~~~~~~~
/in/foo.cc:100:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<st.size()-m+1;i++)
               ~^~~~~~~~~~~~~~
/in/foo.cc:115:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<tmp.size();i++)
               ~^~~~~~~~~~~