Compilare: main.cpp: In function 'void dfs(int)': main.cpp:27:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < g[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:41: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&cer , &n , &m); ^ main.cpp:67:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&x,&y); ^