42/42_INT_06_pushwap
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42_INT_06_pushwap/srcs/algo.c

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#include "push_swap.h"
int last_element(t_stack *a)
{
while (a->next)
a = a->next;
return (a->n);
}
// size is initialized to 1 because the loop check the next element, so it will end one step before reaching it
// it checks the next one to avoid handle the first one with ->limit set to 1
int sublist_size(t_stack *list)
{
int size;
if (list == NULL)
return (0);
size = 1;
while (list->next != NULL && list->next->limit != 1)
{
list = list->next;
size++;
}
return (size);
}
int nbr_element_smaller(t_stack *list, int size, int pivot)
{
int nbr;
nbr = 0;
while (size-- > 0)
{
if (list->n < pivot)
nbr++;
list = list->next;
}
return (nbr);
}
// pivot is the smallest of the bigger group
int find_pivot(t_stack *list, int size)
{
int pivot;
t_stack *head;
pivot = list->n;
head = list;
while (head->next && nbr_element_smaller(list, size, pivot) != size / 2)
{
head = head->next;
pivot = head->n;
}
return (pivot);
}
int divide_a(t_stack **a, t_stack **b, t_list *solution)
{
int list_size;
int pivot;
t_stack *first_rotate;
first_rotate = NULL;
list_size = sublist_size(*a);
pivot = find_pivot(*a, list_size);
(*a)->limit = 0;
while (list_size-- > 0)
{
if ((*a)->n >= pivot)
{
if (!first_rotate)
first_rotate = *a;
ra(a, &solution);
}
else
pb(b, a, &solution);
}
while (*a != first_rotate)
rra(a, &solution);
(*a)->limit = 1;
(*b)->limit = 1;
mark_step(solution, "divide_a");
return (0);
}
int divide_b(t_stack **a, t_stack **b, t_list *solution)
{
int list_size;
int pivot;
t_stack *first_rotate;
first_rotate = NULL;
list_size = sublist_size(*b);
pivot = find_pivot(*b, list_size);
(*b)->limit = 0;
while (list_size-- > 0)
{
if ((*b)->n >= pivot)
pa(a, b, &solution);
else
{
if (!first_rotate)
first_rotate = *b;
rb(b, &solution);
}
}
while (*b != first_rotate)
rrb(b, &solution);
(*a)->limit = 1;
(*b)->limit = 1;
mark_step(solution, "divide_b");
return (0);
}
void send_sublist_to_a(t_stack **a, t_stack **b, t_list *solution)
{
int list_size;
list_size = sublist_size(*b);
(*b)->limit = 0;
while (list_size-- > 0)
pa(a, b, &solution);
(*a)->limit = 1;
if (*b)
(*b)->limit = 1;
mark_step(solution, "send_sublist_to_a");
}
/*
int find_smallest(t_stack *list, int size)
{
t_stack *head;
int smallest;
int position;
smallest = list->n;
head = list;
while (--size > 0)
{
head = head->next;
if (head->n < smallest)
smallest = head->n;
}
position = 0;
while (list->n != smallest)
{
position++;
list = list->next;
}
return (position);
}
void mini_sort(t_stack **a, t_stack **b, t_list *solution)
{
int list_size;
int next;
int temp;
list_size = sublist_size(*a);
if(list_size == 1)
return ;
(*a)->limit = 0;
while (--list_size > 0)
{
next = find_smallest(*a, list_size + 1);
temp = next;
while (next-- > 0)
ra(a, &solution);
pb(b, a, &solution);
while (temp-- > 0)
rra(a, &solution);
}
list_size = sublist_size(*b);
while (list_size-- > 0)
pa(a, b, &solution);
(*a)->limit = 1;
mark_step(solution, "mini_sort");
}
*/
void mark_sublist(t_stack *list)
{
while (list && list->limit != 1)
{
if (list->limit == 2)
list->limit = 0;
else if (list->limit == 0)
list->limit = 2;
list = list->next;
}
}
int find_smallest(t_stack *list)
{
int i;
int smallest;
int position;
smallest = list->n;
position = 1;
i = 0;
while (list)
{
i++;
if (list->limit == 2 && list->n < smallest)
{
smallest = list->n;
position = i;
}
list = list->next;
}
if (i - position + 1 < position)
position = position - i - 1;
return (position);
}
void sort_big(t_stack **a, t_stack **b, t_list *solution)
{
int list_size;
int next;
int i;
list_size = sublist_size(*a);
mark_sublist(*a);
while (--list_size >= 0)
{
i = 0;
next = find_smallest(*a);
if (next > 0)
while (++i < next)
ra(a, &solution);
else if (next < 0)
while (i-- > next)
rra(a, &solution);
pb(b, a, &solution);
}
list_size = sublist_size(*b);
while (list_size-- > 0)
pa(a, b, &solution);
mark_sublist(*a);
}
int find_rank(t_stack *list, int nbr, int i)
{
t_stack *head;
int comp;
int rank;
int j;
head = list;
j = 0;
while (++j <= nbr - i)
head = head->next;
comp = head->n;
head = list;
j = 0;
rank = 1;
while (++j <= nbr)
{
if (comp > head->n)
rank++;
head = head->next;
}
return (rank);
}
int order_is(t_stack *list, int nbr)
{
int order;
int rank;
int i;
i = 0;
order = 0;
while (++i <= nbr)
{
rank = find_rank(list, nbr, i);
order = order * 10 + rank;
}
return (order);
}
void sort_5(t_stack **a, t_list *solution)
{
int order;
48 67 83 54 65
1 4 5 2 3
21 34 20 17 28
3 5 2 1 4
11 13 12 7 10
3 4 5 1 2
6 -3 -12 2 5
5 2 1 3 4
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
order = order_is(*a, 5);
if (order == 12345)
{
s
r
s
r
s
r
s
rr
rr
rr
s
r
s
r
s
rr
rr
s
r
s
rr
s
}
/*
else if (order == 12354)
else if (order == 12435)
else if (order == 12453)
else if (order == 12534)
else if (order == 12543)
else if (order == 13245)
else if (order == 13254)
else if (order == 13425)
else if (order == 13452)
else if (order == 13524)
else if (order == 13542)
else if (order == 14235)
*/
else if (order == 14253)
{
|14253
r 3|1425
s 3|1452
r 23|145
s 23|154
r 423|15
s 423|51
rr 23|514
s 23|541
rr 3|5412
s 3|5421
rr |54213
s |54231
r 1|5423
s 1|5432
rr |54321
}
/*
else if (order == 14325)
else if (order == 14352)
else if (order == 14523)
else if (order == 14532)
else if (order == 15234)
else if (order == 15243)
else if (order == 15324)
else if (order == 15342)
else if (order == 15423)
else if (order == 15432)
else if (order == 21345)
else if (order == 21354)
else if (order == 21435)
else if (order == 21453)
else if (order == 21534)
else if (order == 21543)
else if (order == 23145)
else if (order == 23154)
else if (order == 23415)
else if (order == 23451)
else if (order == 23514)
else if (order == 23541)
else if (order == 24135)
else if (order == 24153)
else if (order == 24315)
else if (order == 24351)
else if (order == 24513)
else if (order == 24531)
else if (order == 25134)
else if (order == 25143)
else if (order == 25314)
else if (order == 25341)
else if (order == 25413)
else if (order == 25431)
else if (order == 31245)
else if (order == 31254)
else if (order == 31425)
else if (order == 31452)
else if (order == 31524)
else if (order == 31542)
else if (order == 32145)
else if (order == 32154)
else if (order == 32415)
else if (order == 32451)
else if (order == 32514)
else if (order == 32541)
else if (order == 34125)
else if (order == 34152)
else if (order == 34215)
else if (order == 34251)
*/
else if (order == 34512)
{
|34512
r 2|3451
r 12|345
s 12|354
r 412|35
s 412|53
rr 12|534
s 12|543
rr 2|5431
rr |54312
s |54321
}
/*
else if (order == 34521)
else if (order == 35124)
else if (order == 35142)
*/
else if (order == 35214)
{
|35214
s |35241
r 1|3524
s 1|3542
r 21|354
r 421|35
s 421|53
rr 21|534
s 21|543
rr 1|5432
rr |54321
}
/*
else if (order == 35241)
else if (order == 35412)
else if (order == 35421)
else if (order == 41235)
else if (order == 41253)
else if (order == 41325)
else if (order == 41352)
else if (order == 41523)
else if (order == 41532)
else if (order == 42135)
else if (order == 42153)
else if (order == 42315)
else if (order == 42351)
else if (order == 42513)
else if (order == 42531)
else if (order == 43125)
else if (order == 43152)
else if (order == 43215)
else if (order == 43251)
else if (order == 43512)
else if (order == 43521)
else if (order == 45123)
else if (order == 45132)
else if (order == 45213)
else if (order == 45231)
else if (order == 45312)
else if (order == 45321)
else if (order == 51234)
else if (order == 51243)
else if (order == 51324)
else if (order == 51342)
else if (order == 51423)
else if (order == 51432)
*/
else if (order == 52134)
{
|52134
s |52143
r 3|5214
s 3|5241
r 13|524
s 13|542
rr 3|5421
rr |54213
s |54231
r 1|5423
s 1|5432
rr |54321
}
/*
else if (order == 52143)
else if (order == 52314)
else if (order == 52341)
else if (order == 52413)
else if (order == 52431)
else if (order == 53124)
else if (order == 53142)
else if (order == 53214)
else if (order == 53241)
else if (order == 53412)
else if (order == 53421)
else if (order == 54123)
else if (order == 54132)
else if (order == 54213)
else if (order == 54231)
else if (order == 54312)
else if (order == 54321)
*/
}
void sort_4(t_stack **a, t_list *solution)
{
int order;
order = order_is(*a, 4);
if (order == 1234)
{
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
rra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 1243)
{
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
rra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 1324)
{
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 1342)
{
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 1423)
{
sa(a, &solution);
ra(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 1432)
{
ra(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 2134)
{
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
rra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
}
else if (order == 2143)
{
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
rra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
}
else if (order == 2314)
{
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
rra(a, &solution);
}
else if (order == 2341)
{
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
rra(a, &solution);
}
else if (order == 2413)
{
sa(a, &solution);
ra(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
rra(a, &solution);
}
else if (order == 2431)
{
ra(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
rra(a, &solution);
}
else if (order == 3124)
{
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 3142)
{
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 3214)
{
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
rra(a, &solution);
}
else if (order == 3241)
{
ra(a, &solution);
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
rra(a, &solution);
}
else if (order == 3412)
{
sa(a, &solution);
ra(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
rra(a, &solution);
}
else if (order == 3421)
{
ra(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
rra(a, &solution);
}
else if (order == 4123)
{
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 4132)
{
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 4213)
{
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
}
else if (order == 4231)
{
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
}
else if (order == 4312)
sa(a, &solution);
}
void sort_3(t_stack **a, t_list *solution)
{
int order;
order = order_is(*a, 3);
if (order == 123)
{
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 132)
{
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
sa(a, &solution);
}
else if (order == 213)
{
sa(a, &solution);
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
}
else if (order == 231)
{
ra(a, &solution);
sa(a, &solution);
rra(a, &solution);
}
else if (order == 312)
sa(a, &solution);
}
void sort_2(t_stack **a, t_list *solution)
{
int order;
order = order_is(*a, 2);
if (order == 12)
sa(a, &solution);
}
void mini_sort(t_stack **a, t_list *solution)
{
int list_size;
list_size = sublist_size(*a);
if(list_size == 1)
return ;
(*a)->limit = 0;
if(list_size == 2)
sort_2(a, solution);
else if(list_size == 3)
sort_3(a, solution);
else if(list_size == 4)
sort_4(a, solution);
else if(list_size == 5)
sort_5(a, solution);
/*
else if(list_size == 6)
sort_6(a, solution);
else
sort_big(a, b, solution);
*/
(*a)->limit = 1;
mark_step(solution, "mini_sort");
}
void hugo_sort(t_stack **a, t_stack **b, t_list *solution)
{
if (sublist_size(*a) > 5)
divide_a(a, b, solution);
else
{
mini_sort(a, solution);
if (sublist_size(*b) > 5)
divide_b(a, b, solution);
else if (sublist_size(*b) > 0)
send_sublist_to_a(a, b, solution);
else
return ;
}
hugo_sort(a, b, solution);
}
// /*
// ** n is the nbr of elements of the list that are competiting
// ** position start at 0, ie position 3 is the 4th element
// */
// int match(t_stack *a, int n, int *smaller)
// {
// int position;
// int i;
//
// *smaller = a->n;
// position = 0;
// i = 1;
// while (a->next && i < n)
// {
// a = a->next;
// if (a->n < *smaller)
// {
// *smaller = a->n;
// position = i;
// }
// i++;
// }
// return (position);
// }
//
// void nb_to_top(t_stack **a, t_list *solution, int i)
// {
// int n;
//
// if (!i)
// return ;
// n = i;
// while (--n)
// ra(a, &solution);
// n = i;
// sa(a, &solution);
// while (--n)
// {
// rra(a, &solution);
// sa(a, &solution);
// }
// }
//
// void push_to_b(t_stack **a, t_stack **b, t_list *solution, int position)
// {
// int i;
//
// i = position;
// while (i--)
// ra(a, &solution);
// pb(b, a, &solution);
// while (++i < position)
// rra(a, &solution);
// }
//
// /*
// ** so far it's bullshit :p
// */
// void hugo_sort(t_stack **a, t_stack **b, t_list *solution)
// {
// int last;
// int position;
// int value;
//
// last = last_element(*a);
// while ((*a)->n != last)
// {
// position = match(*a, 4, &value);
// if (!(*b) || value > (*b)->n)
// push_to_b(a, b, solution, position);
// else
// ra(a, &solution);
// }
// }
/*
sa(a, &solution);
ra(a, &solution);
rra(a, &solution);
pb(b, a, &solution);
pa(a, b, &solution);
sb(b, &solution);
rb(b, &solution);
rrb(b, &solution);
rrr(a, b, &solution);
rr(a, b, &solution);
*/
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