Java - concise code
java\nclass Solution {\n    \n    public boolean lemonadeChange(int[] bills) {\n        int five = 0, ten = 0;\n        \n        for (int bill : bills) {\n    
```java\nclass Solution {\n    \n    public boolean lemonadeChange(int[] bills) {\n        int five = 0, ten = 0;\n        \n        for (int bill : bills) {\n            if (bill == 5) five++;\n            else if (bill == 10) {five--; ten++;}\n            else if (bill == 20 && ten > 0) {ten--; five--;}\n            else five -= 3;\n            \n            if (five < 0) return false;\n        }\n        return true;\n    }\n}\n```
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