USING: io kernel math math.parser sequences ;
readln string>number iota
0
[ drop readln string>number + ] reduce
42 =
[ "YES" ]
[ "NO" ]
if
print
VVNJTkc6IGlvIGtlcm5lbCBtYXRoIG1hdGgucGFyc2VyIHNlcXVlbmNlcyA7CgogICByZWFkbG4gc3RyaW5nPm51bWJlciBpb3RhCiAgIDAKICAgWyBkcm9wIHJlYWRsbiBzdHJpbmc+bnVtYmVyICsgXSByZWR1Y2UKICAgNDIgPQogICBbICJZRVMiIF0KICAgWyAiTk8iIF0KICAgaWYKICAgcHJpbnQ=