✅ Easy C# solution
Code\n\npublic class Solution \n{\n    public bool LemonadeChange(int[] bills)\n    {\n        var five = 0;\n        var ten = 0;\n\n        for (var i = 0; i 
# Code\n```\npublic class Solution \n{\n    public bool LemonadeChange(int[] bills)\n    {\n        var five = 0;\n        var ten = 0;\n\n        for (var i = 0; i < bills.Length; i++)\n        {\n            if (bills[i] == 5)\n            {\n                five++;\n            }\n            else if (bills[i] == 10)\n            {\n                five--;\n                ten++;\n            }\n            else if (ten > 0)\n            {\n                five--;\n                ten--;\n            }\n            else\n            {\n                five -= 3;\n            }\n\n            if (five < 0)\n            {\n                return false;\n            }\n        }\n\n        return true;\n    }\n}\n```\n\n![pleaseupvote.jpg](https://assets.leetcode.com/users/images/b7a5012e-7e04-4133-ac8f-73662aeee924_1677330975.520046.jpeg)\n
['Greedy', 'C#']