Borderou de evaluare (job #376951)

Compilare: user.cpp: In function ‘int dfs(int, int)’: user.cpp:12:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int main()’: user.cpp:17:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:18:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function ‘int dfs(int, int)’: user.cpp:15:1: warning: control reaches end of non-void function [-Wreturn-type]