var c := 42;   // current days leave from past
var a := 20;   // number of days leave per year
var m := 12;   // current month
var n := 31;   // current day in month
var d := 12;    // number of days leave taken in year
var x := 1;    // is leap year 0- no, 1 - yes

// current days in the year progressive to calculate from each month
var p := 
((1 <= m  ? 1 : 0) * 31 - (31 - (1 == m ? n : 31))) +
(x == 0 ? ((2 <= m  ? 1 : 0) * 28 - (28 - (2 == m ? n : 28))) : ((2 <= m  ? 1 : 0) * 29 - (29 - (2 == m ? n : 29)))) +
((3 <= m  ? 1 : 0) * 31 - (31 - (3 == m ? n : 31))) +
((4 <= m  ? 1 : 0) * 30 - (30 - (4 == m ? n : 30))) +
((5 <= m  ? 1 : 0) * 31 - (31 - (5 == m ? n : 31))) +
((6 <= m  ? 1 : 0) * 30 - (30 - (6 == m ? n : 30))) +
((7 <= m  ? 1 : 0) * 31 - (31 - (7 == m ? n : 31))) +
((8 <= m  ? 1 : 0) * 31 - (31 - (8 == m ? n : 31))) +
((9 <= m  ? 1 : 0) * 30 - (30 - (9 == m ? n : 30))) +
((10 <= m  ? 1 : 0) * 31 - (31 - (10 == m ? n : 31))) +
((11 <= m  ? 1 : 0) * 30 - (30 - (11 == m ? n : 30))) +
((12 <= m  ? 1 : 0) * 31 - (31 - (12 == m ? n : 31)));

// days leave by days progressive
var z := (c + (((a / (x == 0 ? 365 : 366)) * 7) * (p / 7))); 
round(z)