Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:12:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[nod].size(); i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:20:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<gt[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:50:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<con[i].size(); j++) ^ user.cpp:31:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.cpp:33:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x, &y); ^