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#pragma once
#include "common.h"
namespace aoc2020 {
struct seat {
enum {
rows = 128,
cols = 8,
};
int row;
int col;
int id() const noexcept { return row * 8 + col; }
bool operator<(const seat& other) const noexcept { return id() < other.id(); }
seat(int r, int c) : row(r), col(c) {}
// F lower
// B higher
// L lower
// R higher
seat(line_view lv) {
const char* p = lv.line;
int minr = 0;
int maxr = 128;
int minc = 0;
int maxc = 8;
while (p < lv.line + lv.length) {
int midr = (maxr + minr) / 2;
if (*p == 'F') {
maxr = midr;
}
if (*p == 'B') {
minr = midr;
}
int midc = (maxc + minc) / 2;
if (*p == 'L') {
maxc = midc;
}
if (*p == 'R') {
minc = midc;
}
p++;
}
row = minr;
col = minc;
// printf("%d %d\n", row, col);
}
};
int day5(line_view);
} // namespace aoc2020
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