Borderou de evaluare (job #349129)

Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:9:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:11:17: warning: no return statement in function returning non-void [-Wreturn-type] user.cpp: In function ‘void urcare(std::vector<int>&, int)’: user.cpp:19:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘void coborare(std::vector<int>&, int)’: user.cpp:45:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:47:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘int main()’: user.cpp:78:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:79:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function ‘char nextch()’: user.cpp:63:29: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]