Package g1401_1500.s1414_find_the_minimum_number_of_fibonacci_numbers_whose_sum_is_k

Class Solution

java.lang.Object

g1401_1500.s1414_find_the_minimum_number_of_fibonacci_numbers_whose_sum_is_k.Solution

public class Solution
extends Object

1414 - Find the Minimum Number of Fibonacci Numbers Whose Sum Is K.

Medium

Given an integer k, return the minimum number of Fibonacci numbers whose sum is equal to k. The same Fibonacci number can be used multiple times.

The Fibonacci numbers are defined as:

• F1 = 1
• F2 = 1
• Fn = Fn-1 + Fn-2 for n > 2.

It is guaranteed that for the given constraints we can always find such Fibonacci numbers that sum up to k.

Example 1:

Input: k = 7

Output: 2

Explanation: The Fibonacci numbers are: 1, 1, 2, 3, 5, 8, 13, … For k = 7 we can use 2 + 5 = 7.

Example 2:

Input: k = 10

Output: 2

Explanation: For k = 10 we can use 2 + 8 = 10.

Example 3:

Input: k = 19

Output: 3

Explanation: For k = 19 we can use 1 + 5 + 13 = 19.

Constraints:

• 1 <= k <= 109

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	findMinFibonacciNumbers(int k)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

findMinFibonacciNumbers

public int findMinFibonacciNumbers(int k)