Eroare de compilare: In file included from /usr/include/_G_config.h:15:0, from /usr/include/libio.h:32, from /usr/include/stdio.h:75, from /usr/include/c++/4.8/cstdio:42, from /usr/include/c++/4.8/ext/string_conversions.h:43, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: user.cpp: In function ‘void fill(int, int, int)’: user.cpp:32:39: error: second operand to the conditional operator is of type ‘void’, but the third operand is neither a throw-expression nor of type ‘void’ val == 1 ? q.push(make_pair(i, j)) : NULL; ^