Borderou de evaluare (job #26983)

Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:20:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int main()’: user.cpp:81:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:86:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:26:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:27:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:32:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:34:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:38:14: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] /tmp/cc77IbCT.o: In function `main': user.cpp:(.text.startup+0xb2): warning: the `gets' function is dangerous and should not be used.