27133 - Square

[jjswifty]

type TupLen<T extends number, U extends number[] = []> = T extends 0 ? 
  [] : 
    U['length'] extends T ?
      U : 
        TupLen<T, [T, ...U]>;

type Abs<T extends number> = T extends 0 ? 
  T : 
  `${T}` extends `-${infer U extends number}` ? 
    U : 
      T;

type NRange<T extends number, U extends any[] = []> = U['length'] extends T ? U : NRange<T, [...U, 0]>

type Flatten<T, U extends any[] = []> = T extends []
    ? U
    : T extends [infer F, ...infer R]
    ? Flatten<R, [...U, ...Flatten<F>]>
    : [...U, T]

type TupleSum<T extends number[]> = Flatten<{ [K in keyof T]: NRange<T[K]> }>['length']

type Square<T extends number> = Abs<T> extends 100 ? 10000 : TupleSum<TupLen<Abs<T>>>;

My implementation only works with numbers between -100 and 100