Compilare: user.cpp: In function ‘int belmann(int)’: user.cpp:23:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[c[p]].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:66:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:69:30: 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,&z); ^ user.cpp: In function ‘int belmann(int)’: user.cpp:31:32: warning: ‘nc’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[nc]=v[c[p]]+r; ^