/in/foo.cc: In function 'int mt(int, int)':
/in/foo.cc:11:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int kx=k;kx<str[x].size();kx++){
                      ~~^~~~~~~~~~~~~~
/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(match[p][j]==str[p].size() || match[p][j]==str[j].size()) continue;
            ~~~~~~~~~~~^~~~~~~~~~~~~~~
/in/foo.cc:33:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(match[p][j]==str[p].size() || match[p][j]==str[j].size()) continue;
                                          ~~~~~~~~~~~^~~~~~~~~~~~~~~