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51 lines
1.1 KiB
51 lines
1.1 KiB
import typing
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def yep(s: str) -> bool:
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return s.strip().lower().startswith("y")
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def guess_bisect_repl(lower: int, upper: int) -> int:
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mid = lower + ((upper - lower) // 2)
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if yep(input(f"is it {mid}? ")):
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return mid
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if yep(input(f"higher than {mid}? ")):
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return guess_bisect_repl(mid, upper)
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return guess_bisect_repl(lower, mid)
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def find_sqrt_ish(n: int) -> int:
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return int(find_bisect(0, n, gen_sqrt_check(n)))
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def gen_sqrt_check(n: int) -> typing.Callable[[float], int]:
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def check(mid: float) -> int:
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mid_sq: float = mid * mid
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if mid_sq == n:
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return 0
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if mid_sq < n:
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return 1
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return -1
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return check
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def find_bisect(lower: float, upper: float, check: typing.Callable[[float], int]) -> float:
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mid: float = lower + ((upper - lower) / 2)
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print(f"lower={lower} mid={mid} upper={upper}")
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if mid == lower or mid == upper or check(mid) == 0:
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return mid
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if check(mid) == 1:
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return find_bisect(mid, upper, check)
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return find_bisect(lower, mid, check)
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