I’m getting run time error on submit but I’m getting the correct answer for sample test case. Please check for correction.
Exchanging coins
Check the constraints
Constraints
0 <= n <= 1 000 000 000
Generally an array of size 10^9 cannot be made. But here n can range upto 10^9. So idea is to use hashmap for memo table and follow top down approach. Go through this discussion Exchanging coins
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