foo.cc: In function 'int main()':
foo.cc:100:11: warning: statement has no effect [-Wunused-value]
  100 |     for ( p1;p1<a1+n1;p1++)  {cin>>*p1;}
      |           ^~
foo.cc:102:11: warning: statement has no effect [-Wunused-value]
  102 |     for ( p2;p2<a2+n2;p2++)  {cin>>*p2;}
      |           ^~

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