Compilare: user.cpp: In function ‘int rad(int)’: user.cpp:29:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void dfs(int, int)’: user.cpp:47:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < gf[node].size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:92:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < edges.size(); ++i) { ^ user.cpp:95:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < gf[x].size(); ++j) { ^ user.cpp:61:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tribes.in", "r", stdin); ^ user.cpp:62:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tribes.out", "w", stdout); ^