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#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <malloc.h>
#include <string.h>
#include "../utils.h"
int solve(const char *filename)
{
FILE *file = fopen(filename, "r");
// Include space for newline and string terminator
char buffer[8] = { 0 };
int w_x = 10;
int w_y = 1;
int y = 0;
int x = 0;
while (fgets(buffer, 8, file)) {
int n = atoi(buffer + 1);
switch (buffer[0]) {
case 'N':
w_y += n;
break;
case 'E':
w_x += n;
break;
case 'S':
w_y -= n;
break;
case 'W':
w_x -= n;
break;
case 'F':
for (int i = 0; i < n; i++) {
x += w_y;
y += w_x;
}
break;
case 'R':
for (int i = 0; i < n / 90; i++) {
SWAP(w_y, w_x);
w_y = -w_y;
}
break;
case 'L':
for (int i = 0; i < n / 90; i++) {
SWAP(w_y, w_x);
w_x = -w_x;
}
break;
default:
break;
}
}
fclose(file);
return abs(x) + abs(y);
}
int main(int argc, char *argv[])
{
printf("%i\n", solve(argv[argc - 1]));
}
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