Compilare: user.cpp: In function ‘void read()’: user.cpp:17: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:18: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void init()’: user.cpp:36: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void APM()’: user.cpp:59: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int DFS(int, int)’: user.cpp:82: warning: comparison between signed and unsigned integer expressions user.cpp:104: warning: control reaches end of non-void function user.cpp:80: warning: ‘Max’ may be used uninitialized in this function