/in/foo.cc: In function 'int main()':
/in/foo.cc:67:13: warning: statement has no effect [-Wunused-value]
     for ( p1;p1<a1+n1;p1++)  {cin>>*p1;}
             ^
/in/foo.cc:69:13: warning: statement has no effect [-Wunused-value]
     for ( p2;p2<a2+n2;p2++)  {cin>>*p2;}
             ^