84. Coin Change

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Input: coins = [1,2,5], amount = 11

Output: 3

Explanation: 11 = 5 + 5 + 1

Input: coins = [2], amount = 3

Output: -1

Explanation: No combination could make the sum of coin to 3.

Input: coins = [1], amount = 0

Output: 0

Explanation: Zero amount dont need any combination

Time Complexity

O(n × amount)

Space Complexity

O(amount)