Initial data commit

Task/Long-year/XBasic/long-year.basic

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+PROGRAM  "LongYear"
+VERSION  "0.0000"
+
+DECLARE FUNCTION Entry ()
+DECLARE FUNCTION p (y)
+DECLARE FUNCTION isLongYear (y)
+
+FUNCTION  Entry ()
+  FOR y = 2000 TO 2100
+    IF isLongYear(y) THEN PRINT y,
+  NEXT y
+END FUNCTION
+
+FUNCTION p (y)
+  RETURN (y + INT(y/4) - INT(y/100) + INT(y/400)) MOD 7
+END FUNCTION
+
+FUNCTION isLongYear (y)
+  RETURN (p(y) = 4) OR (p(y - 1) = 3)
+END FUNCTION
+END PROGRAM