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Explore Stack InternalThanks to Jo King for -33 bytes.
{my \z=[+^] @_;elemselems([""]i)eq(sum z.polymod(sum(elems[+^]([""]@_),elems.polymod([""]))+@_ xx*))} This is equivalent to
{my \z=[+^] @_;11 eq([+]sum z[+^](@_).polymod(2 xx*))} 1 was rewritten as elems([""]). 2 was rewritten as sum(elems([""]),elems([""])); elems(["",""]) might seem to work but elems([""-""]) is also valid and seems to hang the tester.
{my \z=[+^] @_;elems([""])eq(sum z.polymod(sum(elems([""]),elems([""]))xx*))} This is equivalent to
{my \z=[+^] @_;1 eq([+] z.polymod(2 xx*))} 1 was rewritten as elems([""]). 2 was rewritten as sum(elems([""]),elems([""])); elems(["",""]) might seem to work but elems([""-""]) is also valid and seems to hang the tester.
Thanks to Jo King for -33 bytes.
{elems(i)eq(sum [+^](@_).polymod(+@_ xx*))} This is equivalent to
{1 eq(sum [+^](@_).polymod(2 xx*))} 1 was rewritten as elems([""]). 2 was rewritten as sum(elems([""]),elems([""])); elems(["",""]) might seem to work but elems([""-""]) is also valid and seems to hang the tester.
{my \z=[+^] @_;elems([""])eq(sum z.polymod(sum(elems([""]),elems([""]))xx*))} This is equivalent to
{my \z=[+^] @_;1 eq([+] z.polymod(2 xx*))} 1 was rewritten as elems([""]). 2 was rewritten as sum(elems([""]),elems([""])); elems(["",""]) might seem to work but elems([""-""]) is also valid and seems to hang the tester.