The optimal solution would still be the integer point (2, 0), though more integer points are feasible now.
优化解决方案仍然是整数点(2,0)，不过现在可行域中有更多整数点了。
The APIs that set watch points return an integer value, which is the watch point number that was just set.
设置观察点的API 将返回一个整数型值，即刚刚设置的观察点数字。
The third element of the array is the number of points for this assignment type, so I have to invoke the to_s method to convert that integer into a string.
数组第三个元素是该任务类型的分数，所以我必须调用to_s方法，将该整数转换为字符串。
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