Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (ii = 0 ; ii < v[nod].size() ; ii++){ ~~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:84:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:86:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&val[i]); ^ main.cpp:98:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&x,&y); ^