Compilare: user.cpp: In function ‘bool not_existent(int)’: user.cpp:56:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[poz].size(); ++i) ^ user.cpp: In function ‘void bf(int, int)’: user.cpp:92:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[nod].size(); ++i) ^ user.cpp: In function ‘void c(int&)’: user.cpp:33:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,fin),poz1=0; ^ user.cpp:38:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,fin),poz1=0; ^