Borderou de evaluare (job #328402)

Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:15:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int bfs(int)’: user.cpp:28:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:27:9: warning: unused variable ‘fr’ [-Wunused-variable] user.cpp:24:14: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] user.cpp: In function ‘int main()’: user.cpp:42:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:43:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:45:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:47:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]