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Given two sequences of integers, count the minimum number of swaps (A[k], B[k]) needed to make both sequences increasing.

Programming language:
Spoken language:

You have two sequences A and B consisting of integers, both of length N, and you would like them to be (strictly) increasing, i.e. for each K (0 ≤ K < N − 1), A[K] < A[K + 1] and B[K] < B[K + 1]. Thus, you need to modify the sequences, but the only manipulation you can perform is to swap an arbitrary element in sequence A with the corresponding element in sequence B. That is, both elements to be exchanged must occupy the same index position within each sequence.

For example, given A = [5, 3, 7, 7, 10] and B = [1, 6, 6, 9, 9], you can swap elements at positions 1 and 3, obtaining A = [5, 6, 7, 9, 10], B = [1, 3, 6, 7, 9].

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

int solution(int A[], int B[], int N);

that, given two arrays A, B of length N, containing integers, returns the minimum number of swapping operations required to make the given arrays increasing. If it is impossible to achieve the goal, return −1.

For example, given:

your function should return 2, as explained above.

Given:

your function should return −1, since you cannot perform operations that would make the sequences become increasing.

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Copyright 2009–2018 by Codility Limited. All Rights Reserved. Unauthorized copying, publication or disclosure prohibited.

You have two sequences A and B consisting of integers, both of length N, and you would like them to be (strictly) increasing, i.e. for each K (0 ≤ K < N − 1), A[K] < A[K + 1] and B[K] < B[K + 1]. Thus, you need to modify the sequences, but the only manipulation you can perform is to swap an arbitrary element in sequence A with the corresponding element in sequence B. That is, both elements to be exchanged must occupy the same index position within each sequence.

For example, given A = [5, 3, 7, 7, 10] and B = [1, 6, 6, 9, 9], you can swap elements at positions 1 and 3, obtaining A = [5, 6, 7, 9, 10], B = [1, 3, 6, 7, 9].

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

int solution(vector<int> &A, vector<int> &B);

that, given two arrays A, B of length N, containing integers, returns the minimum number of swapping operations required to make the given arrays increasing. If it is impossible to achieve the goal, return −1.

For example, given:

your function should return 2, as explained above.

Given:

your function should return −1, since you cannot perform operations that would make the sequences become increasing.

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Copyright 2009–2018 by Codility Limited. All Rights Reserved. Unauthorized copying, publication or disclosure prohibited.

You have two sequences A and B consisting of integers, both of length N, and you would like them to be (strictly) increasing, i.e. for each K (0 ≤ K < N − 1), A[K] < A[K + 1] and B[K] < B[K + 1]. Thus, you need to modify the sequences, but the only manipulation you can perform is to swap an arbitrary element in sequence A with the corresponding element in sequence B. That is, both elements to be exchanged must occupy the same index position within each sequence.

For example, given A = [5, 3, 7, 7, 10] and B = [1, 6, 6, 9, 9], you can swap elements at positions 1 and 3, obtaining A = [5, 6, 7, 9, 10], B = [1, 3, 6, 7, 9].

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

class Solution { public int solution(int[] A, int[] B); }

that, given two arrays A, B of length N, containing integers, returns the minimum number of swapping operations required to make the given arrays increasing. If it is impossible to achieve the goal, return −1.

For example, given:

your function should return 2, as explained above.

Given:

your function should return −1, since you cannot perform operations that would make the sequences become increasing.

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Copyright 2009–2018 by Codility Limited. All Rights Reserved. Unauthorized copying, publication or disclosure prohibited.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

func Solution(A []int, B []int) int

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

class Solution { public int solution(int[] A, int[] B); }

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

function solution(A, B);

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

function solution(A, B)

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Note: All arrays in this task are zero-indexed, unlike the common Lua convention. You can use `#A` to get the length of the array A.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

int solution(NSMutableArray *A, NSMutableArray *B);

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

function solution(A: array of longint; B: array of longint; N: longint): longint;

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

function solution($A, $B);

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

sub solution { my ($A, $B)=@_; my @A=@$A; my @B=@$B; ... }

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

def solution(A, B)

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

def solution(a, b)

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

object Solution { def solution(a: Array[Int], b: Array[Int]): Int }

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

public func solution(inout A : [Int], inout _ B : [Int]) -> Int

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

public func solution(_ A : inout [Int], _ B : inout [Int]) -> Int

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

Your goal is make both sequences increasing, using the smallest number of moves.

Write a function:

Private Function solution(A As Integer(), B As Integer()) As Integer

For example, given:

your function should return 2, as explained above.

Given:

Given:

your function should return 0, since the sequences are already increasing.

Write an ** efficient** algorithm for the following assumptions:

- N is an integer within the range [2..100,000];
- each element of arrays A, B is an integer within the range [−1,000,000,000..1,000,000,000];
- A and B have equal lengths.

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