Clash Royale CLAN TAG

Finding a key from range in hashmap

Problem

From below list of items I will need to access the item by identifying key range with given value for instance lets say if the value is 2.1.1 which is in degree, minutes & seconds I need to find key 0.0.0-30.0.0
performance is high priority.

key: 0.0.0-30.0.0 value: x-y-z
key: 30.0.0-60.0.0 value: y-x-z
key: 60.0.0-90.0.0 value: z-y-z


Solution1:
Below solutions I have attempted so far

recreate new key/value (json) file as below

key: 0.0.0 value: x-y-z
key: 0.0.1 value: x-y-z
.
key: 0.0.59 value: x-y-z
.
key: 0.1.0 value x-y-z
key: 0.1.1 value x-y-z

key: 30.0.0 value: y-x-z
.
.
key: 30.0.59 value: y-x-z
.
key: 30.1.0 value: y-x-z
key: 30.1.1 value: y-x-z
key: 30.1.2 value: y-x-z
.
.
key: 30.1.59 value: y-x-z
key: 30.2.0 value: y-x-z
key: 30.2.1 value: y-x-z
key: 30-2.3 value: y-x-z
.
.
key: 60.0.0 value: z-y-x
key: 60.0.1 value: z-y-x
key: 60.0.2 value: z-y-x
.
.
key: 60.0.59 value: z-y-x
key: 60.1.0 value: z-y-x
key: 60.1.1 value: z-y-x
.
.


Issue(s)
The issue with above solution is the file size will be increased which is causing heap overflow in my compact app

Solution2

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