Compilare: main.cpp: In function 'double apm(int)': main.cpp:26:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<d[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d",&n); ^ main.cpp:60:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d",&a,&b); ^