Compilare: user.cpp: In function ‘int FindFather(int)’: user.cpp:52: warning: NULL used in arithmetic user.cpp: In function ‘int GetMaxDP(int, int)’: user.cpp:88: warning: comparison between signed and unsigned integer expressions user.cpp:91: warning: NULL used in arithmetic user.cpp: In function ‘void DFS(int)’: user.cpp:102: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void Read()’: user.cpp:136: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:137: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:138: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:141: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void Print()’: user.cpp:148: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result