USING: io kernel math math.parser ;
readln string>number
dup
dup
3
*
*
swap
-
2
swap
number>string print
VVNJTkc6IGlvIGtlcm5lbCBtYXRoIG1hdGgucGFyc2VyIDsKIAogICByZWFkbG4gc3RyaW5nPm51bWJlcgogICBkdXAKICAgZHVwCiAgIDMKICAgKgogICAqCiAgIHN3YXAKICAgLQogICAyCiAgIHN3YXAKICAgZGl2CiAgIG51bWJlcj5zdHJpbmcgcHJpbnQK