/in/foo.cc: In function 'int main()':
/in/foo.cc:40:14: warning: operation on 'nm' may be undefined [-Wsequence-point]
   else  dd[nm=fi(a[i])]=min(dd[nm],a[i]);
            ~~^~~~~~~~~
/in/foo.cc:56:17: warning: operation on 'nm' may be undefined [-Wsequence-point]
       else dd[nm=fi(a[i])+1]=min(dd[nm],a[i]);
               ~~^~~~~~~~~~~