Compilare: user.cpp: In function ‘void BFS()’: user.cpp:37:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graph[X].size();++i) ^ user.cpp: In function ‘void Clear()’: user.cpp:57:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graph[X].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:87:19: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,IN); ^ user.cpp: In function ‘void Read(int&)’: user.cpp:73:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,MAX,1,IN),pos=0; ^ user.cpp:79:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,MAX,1,IN),pos=0; ^