/in/foo.cc: In function 'void supply(Line, Line&)':
/in/foo.cc:39:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(info2.music.size()==info2.ranking) return;
        ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
/in/foo.cc: In function 'void Fun(std::vector<Line>)':
/in/foo.cc:52:13: warning: unused variable 't' [-Wunused-variable]
     int i,j,t;
             ^