/in/foo.cc: In function 'int main()':
/in/foo.cc:13:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (j = 0; j < Name[i].size(); j++)
               ~~^~~~~~~~~~~~~~~~
/in/foo.cc:22:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (j = 0; j < Energy[i].size(); j++)
               ~~^~~~~~~~~~~~~~~~~~
/in/foo.cc:34:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    while (k < Name[i].size() && l < Energy[j].size()){
           ~~^~~~~~~~~~~~~~~~
/in/foo.cc:34:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    while (k < Name[i].size() && l < Energy[j].size()){
                                 ~~^~~~~~~~~~~~~~~~~~
/in/foo.cc:42:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (l == Energy[j].size())
        ~~^~~~~~~~~~~~~~~~~~~