A truck has two fuel tanks. You are given two integers, mainTank representing the fuel present in the main tank in liters and additionalTank representing the fuel present in the additional tank in liters.
The truck has a mileage of 10 km per liter. Whenever 5 liters of fuel get used up in the main tank, if the additional tank has at least 1 liters of fuel, 1 liters of fuel will be transferred from the additional tank to the main tank.
Return the maximum distance which can be traveled.
\n\nNote: Injection from the additional tank is not continuous. It happens suddenly and immediately for every 5 liters consumed.
\n\n\n
Example 1:
\n\n\nInput: mainTank = 5, additionalTank = 10\nOutput: 60\nExplanation: \nAfter spending 5 litre of fuel, fuel remaining is (5 - 5 + 1) = 1 litre and distance traveled is 50km.\nAfter spending another 1 litre of fuel, no fuel gets injected in the main tank and the main tank becomes empty.\nTotal distance traveled is 60km.\n\n\n
Example 2:
\n\n\nInput: mainTank = 1, additionalTank = 2\nOutput: 10\nExplanation: \nAfter spending 1 litre of fuel, the main tank becomes empty.\nTotal distance traveled is 10km.\n\n\n\n
\n
Constraints:
\n\n1 <= mainTank, additionalTank <= 100卡车有两个油箱。给你两个整数，mainTank 表示主油箱中的燃料（以升为单位），additionalTank 表示副油箱中的燃料（以升为单位）。
该卡车每耗费 1 升燃料都可以行驶 10 km。每当主油箱使用了 5 升燃料时，如果副油箱至少有 1 升燃料，则会将 1 升燃料从副油箱转移到主油箱。
返回卡车可以行驶的最大距离。
\n\n注意：从副油箱向主油箱注入燃料不是连续行为。这一事件会在每消耗 5 升燃料时突然且立即发生。
\n\n
示例 1：
\n\n输入：mainTank = 5, additionalTank = 10\n输出：60\n解释：\n在用掉 5 升燃料后，主油箱中燃料还剩下 (5 - 5 + 1) = 1 升，行驶距离为 50km 。\n在用掉剩下的 1 升燃料后，没有新的燃料注入到主油箱中，主油箱变为空。\n总行驶距离为 60km 。\n\n\n
示例 2：
\n\n输入：mainTank = 1, additionalTank = 2\n输出：10\n解释：\n在用掉 1 升燃料后，主油箱变为空。\n总行驶距离为 10km 。\n\n\n
\n\n
提示：
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