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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define FORLINE \
char *line = NULL; \
size_t len = 0; \
while (getline(&line, &len, fp) != EOF)
#define FREELINE \
if (line) \
free(line)
#define FORCH \
char ch = 0; \
while ((ch = fgetc(fp)) != EOF)
#define WHOLE \
fseek(fp, 0, SEEK_END); \
long fsize = ftell(fp); \
fseek(fp, 0, SEEK_SET); \
char *data = malloc(fsize + 1); \
fread(data, 1, fsize, fp); \
data[fsize] = 0; \
data[fsize--] = 0
static int part_one(FILE *fp)
{
int depth = 0, horizontal = 0;
FORLINE
{
char command[32] = { 0 };
int amount;
sscanf(line, "%s %d", command, &amount);
if (!strcmp(command, "forward"))
horizontal += amount;
else if (!strcmp(command, "down"))
depth += amount;
else if (!strcmp(command, "up"))
depth -= amount;
}
FREELINE;
return depth * horizontal;
}
static int part_two(FILE *fp)
{
int aim = 0, depth = 0, horizontal = 0;
FORLINE
{
char command[32] = { 0 };
int amount;
sscanf(line, "%s %d", command, &amount);
if (!strcmp(command, "forward")) {
horizontal += amount;
depth += aim * amount;
} else if (!strcmp(command, "down")) {
aim += amount;
} else if (!strcmp(command, "up")) {
aim -= amount;
}
}
FREELINE;
return depth * horizontal;
}
int main(int argc, char *argv[])
{
(void)argc;
(void)argv;
FILE *fp = fopen("input", "r");
if (!fp)
exit(EXIT_FAILURE);
clock_t tic = clock();
printf("%d\n", part_one(fp));
rewind(fp);
printf("%d\n", part_two(fp));
clock_t toc = clock();
printf("TIME: %f seconds\n", (double)(toc - tic) / CLOCKS_PER_SEC);
fclose(fp);
return 0;
}
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