Compilare: user.cpp: In function ‘void afisG(std::vector<int>*)’: user.cpp:37:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<g[i].size();j++) ^ user.cpp: In function ‘int dfs(std::vector<int>*, int*, int, int)’: user.cpp:53:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:70:15: warning: variable ‘f2’ set but not used [-Wunused-but-set-variable] FILE *f1,*f2; ^ user.cpp:74:28: 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:77:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d",&a,&b); ^