/in/foo.cc: In member function 'bool Hungary::match(int)':
/in/foo.cc:11:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define re(i,s,t) for(int i=s;i<t;++i)
                                 
/in/foo.cc:37:12:
         re(i,0,g[x].size())
            ~~~~~~~~~~~~~~~      
/in/foo.cc:37:9: note: in expansion of macro 're'
         re(i,0,g[x].size())
         ^~