Borderou de evaluare (job #282390)

Compilare: user.cpp: In function ‘void Dfs(int)’: user.cpp:32:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘void Solve()’: user.cpp:45:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘void Write()’: user.cpp:52:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function ‘void Read()’: user.cpp:20:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:21:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:24:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]