Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:69:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graf[nod].size(); i++) { ^ user.cpp: In function ‘int climb(int, int, int)’: user.cpp:158:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘void InputReader::adv()’: user.cpp:28:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, DIM, 1, file); ^ user.cpp: In function ‘int main()’: user.cpp:187:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hacker2.out", "w", stdout); ^ user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:36:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, DIM, 1, file); ^