Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:16:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<a[nod].size();i++) ^ user.cpp: In function ‘void DFS2(int)’: user.cpp:24:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<aT[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:50:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for (j=0;j<so[i].size();j++) ^ user.cpp:31:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d",&n,&m); ^ user.cpp:34:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d",&u,&v); ^