Package g0801_0900.s0842_split_array_into_fibonacci_sequence

Class Solution

  • public class Solution
extends Object
    842 - Split Array into Fibonacci Sequence.

    Medium

    You are given a string of digits num, such as "123456579". We can split it into a Fibonacci-like sequence [123, 456, 579].

    Formally, a Fibonacci-like sequence is a list f of non-negative integers such that:

    • 0 <= f[i] < 231, (that is, each integer fits in a 32-bit signed integer type),
    • f.length >= 3, and
    • f[i] + f[i + 1] == f[i + 2] for all 0 <= i < f.length - 2.

    Note that when splitting the string into pieces, each piece must not have extra leading zeroes, except if the piece is the number 0 itself.

    Return any Fibonacci-like sequence split from num, or return [] if it cannot be done.

    Example 1:

    Input: num = “1101111”

    Output: [11,0,11,11]

    Explanation: The output [110, 1, 111] would also be accepted.

    Example 2:

    Input: num = “112358130”

    Output: []

    Explanation: The task is impossible.

    Example 3:

    Input: num = “0123”

    Output: []

    Explanation: Leading zeroes are not allowed, so “01”, “2”, “3” is not valid.

    Constraints:

    • 1 <= num.length <= 200
    • num contains only digits.

    • Constructor Detail

      • Solution

        public Solution()