Design an ATM Machine LeetCode solution in C++

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class ATM {
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 public:
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  long long bank[5] = {}, val[5] = {20, 50, 100, 200, 500};
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  void deposit(vector<int> banknotesCount) {
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    for (int i = 0; i < 5; ++i) bank[i] += banknotesCount[i];
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  }
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  vector<int> withdraw(int amount) {
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    vector<int> take(5);
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    for (int i = 4; i >= 0; --i) {
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      take[i] = min(bank[i], amount / val[i]);
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      amount -= take[i] * val[i];
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    }
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    if (amount) return {-1};
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    for (int i = 0; i < 5; ++i) bank[i] -= take[i];
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    return take;
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  }
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};