Compilare: main.cpp: In function 'void gec(int)': main.cpp:40:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int y=0;y<v[nod].size();y++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:53:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&n,&k); ^ main.cpp:56:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&x,&y); ^