Compilare: user.cpp: In function ‘int main()’: user.cpp:91: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In member function ‘void SexyGraphAdjacency::LoadEdges(char*)’: user.cpp:445: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:447: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:455: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result