This algorithm simulates the addressing system on a computer disc file. The diagram represents a disc divided into $4$ quadrants, each quadrant divided into $3$ tracks and each track divided into a number of locationsIn these locations are alphabetic characters. These represents the contents of the location not the addresses of the locations. The addresses are given by the formulaQUADRANT $/$ TRACK $/$ LOCATIONThe quadrants are A B C D in a clockwise direction. The tracks are A B C from outside to insideThus, the expression ofQUADRANT $/$ TRACK $/$ LOCATION A A ARefers to the first quadrant and within it to the first track abd within it to the first location.Looking at the diagram you will see this contains the letter H$.$In order to group the Q T L symbols into a coherent entry it will be represented as A $($A$,$A$)$First the QuadrantThe brackets and the comma within the brackets disappearIn some of the following questions you will find that the letters produced as answer from the first level of the problem form, yet another set of quadrant $/$ tracks $/$ locations referenced, and your task is to follow the trail down to a final single letter answerShould you encounter a single letter contained within the brackets like this $($F$)$ you are to replace it and the brackets by the letter V and then carry onThe expression B $(($B $($A$,$ A$)),$ C$)$Becomes B $(($F$),$ C$)$Becomes B $($V$,$ C$)$And the answer is CShould you encounter brackets within other brackets, deal with the innermost set first and work outwards until you solved the expression. $0100112521603167425152766305731284009576$When we write bucket we mean the number of the bucket when we write$($bucket$)$we mean the three digit number contained in the bucket in order to determine the value for any member of the expression $-($x$)$ or $($y$)$ or $($z$)-$ locate the series given by the grid reference.now add together the first and second operant the result is to be added to the minor total if the switch is greater than $5$ or subtracted from it if the switch is less than $6$ to the sum you must now add bucket plus major total.The result now gives a grid reference number which is the first digit of a two digit number this number indicates how many digits there are in the answer which you require The answer itself begin immediately after two digits number As an example we shall show you how to work out the first member of the expression in ACCUMST$[(32)(77)(445)]$Locate the series indicated by $32$ it is $06631112$Add the first and second operants $=4$Add the sum to the minor total if switch is $>5$Switch is $2$ therefore subtract $4$ from $11$ giving $7$Add$($bucket$)$giving $312$Add major total given $318$Starting at grid reference $18$ is a two digit number giving the answer as an eight digits number immediately following I.e $20932020$