Compilare: main.cpp: In function 'void afisare()': main.cpp:23:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0 ; j<v[i].size() ; j++) ~^~~~~~~~~~~~ main.cpp: In function 'void DFS(int)': main.cpp:33:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0 ; i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:40:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("dfs.in","r",stdin); ^ main.cpp:41:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("dfs.out","w",stdout); ^