Compilare: main.cpp: In function 'void dfs_print(int, int, int&)': main.cpp:74:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = new_gr[nod].size(); i < clq[nod].size(); i++){ ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:116:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("linegraph.in","r",stdin); ^ main.cpp:117:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("linegraph.out", "w", stdout); ^