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#include "aoc.h"
namespace aoc2016 {
instruction parse_day1(const char** pp) {
instruction i;
const char* p = *pp;
i.direction = (*p++) == 'R' ? instruction::right : instruction::left;
while (*p >= '0' && *p <= '9') {
i.distance = i.distance * 10 + *p - '0';
p++;
}
*pp = p;
return i;
}
std::pair<int, int> day1(line_view file) {
position x{position::north, 0, 0};
std::vector<instruction> is;
bool found = false;
position first{position::north, 0, 0};
const char* p1 = file.line;
const char* p2 = file.line + file.length;
while (p1 < p2) {
if (*p1 == 'R' || *p1 == 'L') {
is.emplace_back(parse_day1(&p1));
} else {
p1++;
}
}
position n = x.move(is, &first, &found);
return {x.blocks(n), x.blocks(first)};
}
} // namespace aoc2016
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