Compilare: user.cpp: In function ‘void Read()’: user.cpp:15:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ", &n, &m); ^ user.cpp:19:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp: In function ‘void Solve()’: user.cpp:39:17: warning: ‘ok’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( ok ) ^