Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:10:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++){ ^ user.cpp:14:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (f[vecin]==vinv[vecin].size()) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:21:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<vinv[nod].size();i++){ ^ user.cpp:25:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (f[vecin]==v[vecin].size()) ^ user.cpp: In function ‘int main()’: user.cpp:34:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:36:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&t[i]); ^ user.cpp:38:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&m); ^ user.cpp:44:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&x); ^