def solve_coin_change(denominations, amount):     solution = [0] * (amount + 1)     solution[0] = 1     for den in denominations:         for i in range(den, amount + 1):             solution[i] += solution[i - den]     return solution[len(solution) - 1] denominations = [1,2,5] amount = 5 solve_coin_change(denominations,amount) # 4.

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