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Complete Day 10 Part 1

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nalydmerc
2023-12-10 18:31:07 -05:00
parent 439b4479e7
commit 97cddfb64a
1 changed files with 106 additions and 211 deletions
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317
10/10.c
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@@ -4,154 +4,12 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#define DEFAULT_FILE "input2.txt" #define DEFAULT_FILE "input.txt"
#define STRBUF_LEN 200 #define STRBUF_LEN 200
#define GRID_ROWS 5 // #define GRID_ROWS 5
#define GRID_COLS 5 // #define GRID_COLS 5
#define GRID_ROWS 140
/********************************************************/ #define GRID_COLS 140
// Linked List Functions
/********************************************************/
// Node structure
typedef struct ll_node {
void *data;
struct ll_node *next;
} ll_node;
// Linked list structure
typedef struct linked_list {
ll_node* head;
} linked_list;
void ll_init(linked_list* list) {
list->head = NULL;
}
// Function to create a new node
ll_node* ll_create_node(void *data) {
ll_node* new_node = (ll_node*)malloc(sizeof(ll_node));
if (new_node != NULL) {
new_node->data = data;
new_node->next = NULL;
}
return new_node;
}
// Function to add a node to the beginning of the list
void ll_prepend(linked_list* list, void *data) {
ll_node* new_node = ll_create_node(data);
if (new_node != NULL) {
new_node->next = list->head;
list->head = new_node;
}
}
// Function to add a node to the end of the list
void ll_append(linked_list* list, void *data) {
ll_node* newNode = ll_create_node(data);
if (newNode != NULL) {
if (list->head == NULL) {
list->head = newNode;
} else {
ll_node* current = list->head;
while (current->next != NULL) {
current = current->next;
}
current->next = newNode;
}
}
}
// Function to remove a node with a given value
void ll_remove(linked_list* list, void *data, bool (*compare_function)(void *, void*)) {
ll_node* current = list->head;
ll_node* prev = NULL;
while (current != NULL && !compare_function(current->data, data)) {
prev = current;
current = current->next;
}
if (current != NULL) {
if (prev != NULL) {
prev->next = current->next;
} else {
list->head = current->next;
}
free(current);
}
}
// Function to free the memory used by the linked list
void ll_free(linked_list* list) {
ll_node* current = list->head;
ll_node* next;
while (current != NULL) {
next = current->next;
free(current->data);
free(current);
current = next;
}
list->head = NULL;
}
uint64_t ll_len(linked_list* list)
{
uint64_t len = 0;
ll_node *current = list->head;
while (current != NULL)
{
len++;
current = current->next;
}
return len;
}
/**
* @brief Prints all elements in a linked list
*
* @param list
* @param print_data_func A function that prints the data of a node when
* passed the pointer to its data
*/
void print_list(linked_list *list, void (*print_data_func)(void *data))
{
ll_node* current = list->head;
while (current != NULL) {
print_data_func(current->data);
current = current->next;
}
}
/********************************************************/
// Implimentation Specific Linked List Functions
/********************************************************/
typedef struct _distance_data
{
int row;
int col;
int distance;
} distance_data;
void print_data_func(void *data)
{
distance_data *d = (distance_data *)data;
int row = d->row;
int col = d->col;
int distance = d->distance;
printf("R:%d C:%d D:%d\n", row, col, distance);
}
/********************************************************/
// Challenge functions
/********************************************************/
/** /**
* @brief Reads a file and loads the grid into * @brief Reads a file and loads the grid into
@@ -194,37 +52,29 @@ bool find_s(char grid[GRID_ROWS][GRID_COLS], int *row_idx, int *col_idx)
return false; return false;
} }
/**
* @brief Populates a node on the linked list with information
* about a single nodes distance value
*/
void append_distance(int distance, int row, int col, linked_list *list)
{
distance_data *data = malloc(sizeof(distance_data));
data->row = row;
data->col = col;
data->distance = distance;
ll_append(list, data);
}
/** /**
* @brief Checks if the cell above should be populated, and populates it if so * @brief Checks if the cell above should be populated, and populates it if so
* *
* @return true if the cell was populated * @return true if the cell was populated
* @return false if the cell was not populatd * @return false if the cell was not populatd
*/ */
void populate_distance_above(distance_data *data, linked_list *list, char grid[GRID_ROWS][GRID_COLS]) bool populate_distance_above(int row, int col, int distance_grid[GRID_ROWS][GRID_COLS], char grid[GRID_ROWS][GRID_COLS])
{ {
int row = data->row; if (!row) return false;
int col = data->col;
int distance = data->distance;
if (!col) return; char c = grid[row][col];
if (c != '|' && c != 'J' && c != 'L' && c != 'S') return false;
char above = grid[row][col - 1]; // Check for existing distance
if (above != '|' && above != '7' && above != 'F') return; char above = grid[row - 1][col];
if (above != '|' && above != '7' && above != 'F') return false;
append_distance(distance + 1, row, col - 1, list); // Check for existing distance
if (distance_grid[row - 1][col] != -1) return false;
int distance = distance_grid[row][col];
distance_grid[row - 1][col] = distance + 1;
return true;
} }
/** /**
@@ -233,18 +83,22 @@ void populate_distance_above(distance_data *data, linked_list *list, char grid[G
* @return true if the cell was populated * @return true if the cell was populated
* @return false if the cell was not populatd * @return false if the cell was not populatd
*/ */
void populate_distance_left(distance_data *data, linked_list *list, char grid[GRID_ROWS][GRID_COLS]) bool populate_distance_left(int row, int col, int distance_grid[GRID_ROWS][GRID_COLS], char grid[GRID_ROWS][GRID_COLS])
{ {
int row = data->row; if (!col) return false;
int col = data->col;
int distance = data->distance;
if (!row) return; char c = grid[row][col];
if (c != '-' && c != '7' && c != 'J' && c != 'S') return false;
char left = grid[row - 1][col]; char left = grid[row][col - 1];
if (left != '-' && left != 'L' && left != 'F') return; if (left != '-' && left != 'L' && left != 'F') return false;
append_distance(distance + 1, row - 1, col, list); // Check for existing distance
if (distance_grid[row][col - 1] != -1) return false;
int distance = distance_grid[row][col];
distance_grid[row][col - 1] = distance + 1;
return true;
} }
/** /**
@@ -253,18 +107,22 @@ void populate_distance_left(distance_data *data, linked_list *list, char grid[GR
* @return true if the cell was populated * @return true if the cell was populated
* @return false if the cell was not populatd * @return false if the cell was not populatd
*/ */
void populate_distance_right(distance_data *data, linked_list *list, char grid[GRID_ROWS][GRID_COLS]) bool populate_distance_right(int row, int col, int distance_grid[GRID_ROWS][GRID_COLS], char grid[GRID_ROWS][GRID_COLS])
{ {
int row = data->row; if (row == GRID_ROWS) return false;
int col = data->col; char c = grid[row][col];
int distance = data->distance; if (c != '-' && c != 'L' && c != 'F' && c != 'S') return false;
if (row == GRID_ROWS) return; // Check for connecting pipe
char right = grid[row][col + 1];
if (right != '-' && right != '7' && right != 'J') return false;
char right = grid[row + 1][col]; // Check for existing distance
if (right != '-' && right != '7' && right != 'J') return; if (distance_grid[row][col + 1] != -1) return false;
append_distance(distance + 1, row + 1, col, list); int distance = distance_grid[row][col];
distance_grid[row][col + 1] = distance + 1;
return true;
} }
/** /**
@@ -276,44 +134,73 @@ void populate_distance_right(distance_data *data, linked_list *list, char grid[G
* @return true if the cell was populated * @return true if the cell was populated
* @return false if the cell was not populatd * @return false if the cell was not populatd
*/ */
bool populate_distance_below(distance_data *data, linked_list *list, char grid[GRID_ROWS][GRID_COLS]) bool populate_distance_below(int row, int col, int distance_grid[GRID_ROWS][GRID_COLS], char grid[GRID_ROWS][GRID_COLS])
{ {
int row = data->row;
int col = data->col;
int distance = data->distance;
if (col == GRID_COLS) return false; if (col == GRID_COLS) return false;
char below = grid[row][col + 1]; char c = grid[row][col];
if (c != '|' && c != 'F' && c != '7' && c != 'S') return false;
// Check for connecting pipe
char below = grid[row + 1][col];
if (below != '|' && below != 'J' && below != 'L') return false; if (below != '|' && below != 'J' && below != 'L') return false;
append_distance(distance + 1, row, col + 1, list); // Check for existing distance
if (distance_grid[row + 1][col] != -1) return false;
int distance = distance_grid[row][col];
distance_grid[row + 1][col] = distance + 1;
return true; return true;
} }
void populate_distances_around(distance_data *data, linked_list *list, char grid[GRID_ROWS][GRID_COLS]) bool populate_distances_around(int row, int col, int distance_grid[GRID_ROWS][GRID_COLS], char grid[GRID_ROWS][GRID_COLS])
{ {
int r = data->row; bool progress_made = false;
int col = data->col; if (populate_distance_above(row, col, distance_grid, grid)) progress_made = true;
int distance = data->distance; if (populate_distance_left(row, col, distance_grid, grid)) progress_made = true;
populate_distance_above(data, list, grid); if (populate_distance_right(row, col, distance_grid, grid)) progress_made = true;
populate_distance_left(data, list, grid); if (populate_distance_below(row, col, distance_grid, grid)) progress_made = true;
populate_distance_right(data, list, grid); return progress_made;
populate_distance_below(data, list, grid);
} }
/** /**
* @brief Traverses each node of a linked list and populates all distances around those nodes * @brief Preform pass of entire grid and populate next step of distances
* *
* @param distance the NEW distance to populate * @param distance the current distance to populate around
*/ */
void populate_distance_step(int distance, linked_list *list, char grid[GRID_ROWS][GRID_COLS]) bool populate_distance_step(int current_distance, int distance_grid[GRID_ROWS][GRID_COLS], char grid[GRID_ROWS][GRID_COLS])
{ {
ll_node *current = list->head; int row = 0;
int col = 0;
bool progress_made = false;
while (current != NULL) for (row = 0; row < GRID_ROWS; row++)
{ {
for (col = 0; col < GRID_COLS; col++)
{
if (distance_grid[row][col] == current_distance)
{
progress_made = populate_distances_around(row, col, distance_grid, grid);
}
}
}
return progress_made;
}
void print_distance_map(int distance_grid[GRID_ROWS][GRID_COLS])
{
int row = 0;
int col = 0;
for (row = 0; row < GRID_ROWS; row++)
{
for (col = 0; col < GRID_COLS; col++)
{
if (distance_grid[row][col] != -1) printf(" %0.2d", distance_grid[row][col]);
else printf(" .");
}
printf("\n");
} }
} }
@@ -337,9 +224,8 @@ int main(int argc, char **argv)
} }
char grid[GRID_ROWS][GRID_COLS] = {0}; char grid[GRID_ROWS][GRID_COLS] = {0};
int distance_grid[GRID_ROWS][GRID_COLS];
linked_list dist_list; memset(distance_grid, -1, sizeof(distance_grid));
ll_init(&dist_list);
load_grid(file, grid); load_grid(file, grid);
@@ -352,11 +238,20 @@ int main(int argc, char **argv)
return 1; return 1;
} }
append_distance(0, r, c, &dist_list); int current_distance = 0;
distance_grid[r][c] = 0;
bool progress_made = true;
while (progress_made)
{
progress_made = populate_distance_step(current_distance, distance_grid, grid);
printf("---\n");
current_distance++;
}
print_distance_map(distance_grid);
printf("%c", grid[r][c]);
printf("Longest route: %d", current_distance);
return 0; return 0;
} }