/in/foo.cc: In function 'void judgemap()':
/in/foo.cc:29:9: warning: variable 'mark' set but not used [-Wunused-but-set-variable]
     int mark = 1;
         ^~~~
/in/foo.cc: In function 'void input()':
/in/foo.cc:50:36: warning: 'memset' used with constant zero length parameter; this could be due to transposed parameters [-Wmemset-transposed-args]
     memset( jig , sizeof( jig ), 0 );
                                    ^