Compilare: In file included from /usr/include/c++/4.8/cassert:43:0, from user.cpp:3: user.cpp: In function ‘void solve()’: user.cpp:150:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(h[ l ].size() == d[ nod ]); ^ user.cpp: In member function ‘char InputReader::nextpos()’: user.cpp:45:42: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, Size, 1, fin); ^