Compilare: user.cpp: In function ‘int main()’: user.cpp:46:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<nod[no].size();++i) ~^~~~~~~~~~~~~~~ user.cpp:26:15: warning: unused variable ‘j’ [-Wunused-variable] int m,n,i,j,x,y,c,no,dist,cost,vecin; ^ user.cpp:29:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&m,&n); ^ user.cpp:32:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&x,&y,&c); ^