Wikipedia
The McNuggets version of the coin problem was introduced by Henri Picciotto,
who included it in his algebra textbook co-authored with Anita Wah. Picciotto
thought of the application in the 1980s while dining with his son at
McDonald's, working the problem out on a napkin. A McNugget number is
the total number of McDonald's Chicken McNuggets in any number of boxes.
In the United Kingdom, the original boxes (prior to the introduction of
the Happy Meal-sized nugget boxes) were of 6, 9, and 20 nuggets.

Task

Calculate (from 0 up to a limit of 100) the largest non-McNuggets
number (a number n which cannot be expressed with 6x + 9y + 20z = n
where x, y and z are natural numbers).




            NORMAL MODE IS INTEGER
            BOOLEAN NUGGET
            DIMENSION NUGGET(101)
 
            THROUGH CLEAR, FOR I=0, 1, I.G.100
CLEAR       NUGGET(I) = 0B
 
            THROUGH MARK, FOR A=0, 6, A.G.100
            THROUGH MARK, FOR B=A, 9, B.G.100
            THROUGH MARK, FOR C=B, 20, C.G.100
MARK        NUGGET(C) = 1B
 
SEARCH      THROUGH SEARCH, FOR I=100, -1, .NOT.NUGGET(I) 
 
            PRINT FORMAT F, I
            VECTOR VALUES F = $29HMAXIMUM NON-MCNUGGET NUMBER: ,I2*$
            END OF PROGRAM 