Problema
On each move, choose one rectangle and cut all the way across it, parallel to a side, making two rectangles with positive integer side lengths. Continue until every piece is a square. Squares may have different sizes. Count cuts, not pieces.
Implement rectangle_cutting(height, width).
Input
height: The starting rectangle height.
width: The starting rectangle width.
Output
Return the minimum number of cuts.
Restrições
1 ≤ height, width ≤ 500. Rotation does not change the answer.
Exemplos
Entrada:
width = 3
height = 2
Saída esperada:
expected = 2Entrada:
long long width = 3;
long long height = 2;
Saída esperada:
long long expected = 2;Entrada:
long width = 3;
long height = 2;
Saída esperada:
long expected = 2;Explicação
Cut off a 2 × 2 square, leaving a 2 × 1 rectangle. One more cut splits the remainder into two unit squares.
Entrada:
width = 4
height = 4
Saída esperada:
expected = 0Entrada:
long long width = 4;
long long height = 4;
Saída esperada:
long long expected = 0;Entrada:
long width = 4;
long height = 4;
Saída esperada:
long expected = 0;Explicação
The starting rectangle is already a square.
Como abordar
Tente sozinho primeiro e depois abra uma dica de cada vez.
Dica 1
A rectangle can be solved by splitting it into two smaller rectangles and combining their best answers.
Dica 2
Try every possible horizontal and vertical cut to find the minimum.
Dica 3
Memoization or a table is helpful because many subrectangles repeat.
Complexidade esperada
O(h*w*(h+w)) time, O(h*w) extra space
Referências
Este desafio foi adaptado para o CodeUtility. Siga o enunciado e as restrições acima.