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Restore aoc backup.

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dfdx
2024-07-05 19:55:39 -04:00
parent e55b92bb46
commit d84e861477
29 changed files with 4175 additions and 0 deletions
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70
2015/day03/answer01.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "01_hashtable.c"
house **process_next_house(house **hash_table, uint32_t *table_size, int32_t *x, int32_t *y, uint32_t *hcount) {
//first check to see if we need to enlarge the hash table
if (hash(*x, *y) > *table_size - 1) {
*table_size = *table_size * 2;
hash_table = ht_resize(hash_table, *table_size / 2, *table_size);
}
//process next house
house *loc = ht_lookup(hash_table, *x, *y);
if (loc == NULL) {
(*hcount)++;
ht_insert(hash_table, *x, *y, 1);
} else {
(loc->p)++;
}
return hash_table;
}
int main() {
FILE *file = fopen("input", "r");
if (file == NULL) {
perror("main: error opening file.");
return 1;
}
uint32_t table_size = 25;
house **hash_table = ht_init(table_size);
int32_t x = 0;
int32_t y = 0;
ht_insert(hash_table, x, y, 1); //initial house at (0, 0).
uint32_t hcount = 1;
int32_t c;
while ((c = fgetc(file)) != EOF) {
if(c == '^') {
y++;
hash_table = process_next_house(hash_table, &table_size, &x, &y, &hcount);
} else if (c == 'v') {
y--;
hash_table = process_next_house(hash_table, &table_size, &x, &y, &hcount);
} else if (c == '>') {
x++;
hash_table = process_next_house(hash_table, &table_size, &x, &y, &hcount);
} else if (c == '<') {
x--;
hash_table = process_next_house(hash_table, &table_size, &x, &y, &hcount);
}
}
if (ferror(file)) {
perror("main: error reading from file.");
return -1;
}
fclose(file);
printf("unique houses: %u\n", hcount);
for (uint32_t i = 0; i < table_size; i++) {
free(hash_table[i]);
}
free(hash_table);
return 0;
}

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2015/day03/answer02.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "01_hashtable.c"
house **process_next_house(house **hash_table, uint32_t *table_size, int32_t *x, int32_t *y, uint32_t *hcount) {
//first check to see if we need to enlarge the hash table
if (hash(*x, *y) > *table_size - 1) {
*table_size = *table_size * 2;
hash_table = ht_resize(hash_table, *table_size / 2, *table_size);
}
//process next house
house *loc = ht_lookup(hash_table, *x, *y);
if (loc == NULL) {
(*hcount)++;
ht_insert(hash_table, *x, *y, 1);
} else {
(loc->p)++;
}
return hash_table;
}
int main() {
FILE *file = fopen("input", "r");
if (file == NULL) {
perror("main: error opening file.");
return 1;
}
uint32_t table_size = 25;
house **hash_table = ht_init(table_size);
/* Santa */
int32_t x_s = 0;
int32_t y_s = 0;
ht_insert(hash_table, x_s, y_s, 1); //initial house at (0, 0)
uint32_t hcount = 1;
/* Robo-Santa */
int32_t x_r = 0;
int32_t y_r = 0;
enum toggle {
santa,
robo_santa
};
enum toggle turn = robo_santa;
int32_t c;
while ((c = fgetc(file)) != EOF) {
turn = turn ^ robo_santa; //toggle turn
switch(turn) {
case santa:
if (c == '^') {
y_s++;
hash_table = process_next_house(hash_table, &table_size, &x_s, &y_s, &hcount);
} else if (c == 'v') {
y_s--;
hash_table = process_next_house(hash_table, &table_size, &x_s, &y_s, &hcount);
} else if (c == '>') {
x_s++;
hash_table = process_next_house(hash_table, &table_size, &x_s, &y_s, &hcount);
} else if (c == '<') {
x_s--;
hash_table = process_next_house(hash_table, &table_size, &x_s, &y_s, &hcount);
}
break;
case robo_santa:
if (c == '^') {
y_r++;
hash_table = process_next_house(hash_table, &table_size, &x_r, &y_r, &hcount);
} else if (c == 'v') {
y_r--;
hash_table = process_next_house(hash_table, &table_size, &x_r, &y_r, &hcount);
} else if (c == '>') {
x_r++;
hash_table = process_next_house(hash_table, &table_size, &x_r, &y_r, &hcount);
} else if (c == '<') {
x_r--;
hash_table = process_next_house(hash_table, &table_size, &x_r, &y_r, &hcount);
}
break;
default:
perror("main: turn error.");
return -1;
}
}
if (ferror(file)) {
perror("main: error reading from file.");
return -1;
}
fclose(file);
printf("unique houses: %u\n", hcount);
for (uint32_t i = 0; i < table_size; i++) {
free(hash_table[i]);
}
free(hash_table);
return 0;
}

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2015/day03/input Normal file
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10
2015/day03/makefile Normal file
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CC = gcc
CFLAGS = -std=c99 -Wall -g
LDFLAGS =
1: answer01.c
$(CC) $(CFLAGS) answer01.c -o answer01
2: answer02.c
$(CC) $(CFLAGS) answer02.c -o answer02