/in/foo.c: In function 'main':
/in/foo.c:20:29: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   20 |                 for(j=0;j<n1,j!=i;j++)
      |                             ^
/in/foo.c:32:29: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   32 |                 for(j=0;j<n2,j!=i;j++)
      |                             ^
/in/foo.c:17:18: warning: unused variable 'd' [-Wunused-variable]
   17 |         int k2=0,d;
      |                  ^