/in/foo.cc: In function 'bool bfs()':
/in/foo.cc:44:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 | for( register int i = 0 ; i < linker[ now ].size() ; i++ )
      |                           ~~^~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc: In function 'long long int dinic(int, long long int)':
/in/foo.cc:54:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 | for( register int i = cur[ now ] ; i < linker[ now ].size() ; i++ )
      |                                    ~~^~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc: In function 'bool check(long long int)':
/in/foo.cc:84:28: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   84 | while( bfs() ) while( temp = dinic( s , inf ) ) ans += temp;
      |                       ~~~~~^~~~~~~~~~~~~~~~~~