73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
#include "_.h"
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
if (argc != 2)
|
|
return 1;
|
|
|
|
char *input = argv[1];
|
|
char **inputs = str_split(strdup(input), '\n');
|
|
|
|
int x = 0, y = 0;
|
|
for (int i = 0; inputs[i] != NULL; i++)
|
|
for (int j = 0; inputs[i][j] != '\0'; j++)
|
|
if (inputs[i][j] == '^') {
|
|
y = i;
|
|
x = j;
|
|
}
|
|
|
|
int direction = 0; // 0 = top; 1 = right; 2 = down; 3 = left
|
|
while (1) {
|
|
if (direction == 0) {
|
|
if (inputs[y - 1] == NULL)
|
|
break;
|
|
if (inputs[y - 1][x] == '#')
|
|
direction++;
|
|
else {
|
|
inputs[y][x] = 'X';
|
|
y--;
|
|
}
|
|
}
|
|
else if (direction == 1) {
|
|
if (x + 1 >= strlen(inputs[y]))
|
|
break;
|
|
if (inputs[y][x + 1] == '#')
|
|
direction++;
|
|
else {
|
|
inputs[y][x] = 'X';
|
|
x++;
|
|
}
|
|
}
|
|
else if (direction == 2) {
|
|
if (inputs[y + 1] == NULL)
|
|
break;
|
|
if (inputs[y + 1][x] == '#')
|
|
direction++;
|
|
else {
|
|
inputs[y][x] = 'X';
|
|
y++;
|
|
}
|
|
}
|
|
else if (direction == 3) {
|
|
if (x - 1 < 0)
|
|
break;
|
|
if (inputs[y][x - 1] == '#')
|
|
direction = 0;
|
|
else {
|
|
inputs[y][x] = 'X';
|
|
x--;
|
|
}
|
|
}
|
|
}
|
|
|
|
int count = 1;
|
|
for (int i = 0; inputs[i] != NULL; i++)
|
|
for (int j = 0; inputs[i][j] != '\0'; j++)
|
|
if (inputs[i][j] == 'X')
|
|
count++;
|
|
|
|
printf("count: %d\n", count);
|
|
|
|
return 0;
|
|
}
|