day15.k


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a:634
b:301

n:40000000

u:65536!n{2147483647!16807*x}\a
v:65536!n{2147483647!48271*x}\b
+/u=v		/ 573

/ +/=/'65536!40000000(2147483647!16807 48271*)\634,301   slower

n:5000000

u:{~4!x}#65536!(4*n){2147483647!16807*x}\a
v:{~8!x}#65536!(8*n+4000){2147483647!48271*x}\b
+/(n#u)=(n#v)  / 294

\\