1
403((y) =>
(f => f(100))
(y(self =>
n => n < 0 ? 0 : n + self(n-1))))
(g =>
(f=>f(f))(
self =>
g( (...args)=>self(self)(...args) )
))
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没细看，讲真感觉箭头函数嵌套了太多太影响阅读性了，当然可能是我水平低的缘故
随便瞟了一眼，应该是用递归来模拟循环。。大佬要是觉得我说错了。。请指出 我会改