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const std = @import("std");
pub fn puzzle_1(input: []const u8) !u16 {
var iter = std.mem.split(u8, input, "\n");
var count: u16 = 0;
while (iter.next()) |line| {
const range = try parse_range(line);
if ((range[0][0] >= range[1][0] and range[0][1] <= range[1][1]) or
(range[0][0] <= range[1][0] and range[0][1] >= range[1][1]))
count += 1;
}
return count;
}
pub fn puzzle_2(input: []const u8) !u16 {
var iter = std.mem.split(u8, input, "\n");
var count: u16 = 0;
while (iter.next()) |line| {
const range = try parse_range(line);
if ((range[0][0] >= range[1][0] and range[0][0] <= range[1][1]) or
(range[0][0] <= range[1][0] and range[0][1] >= range[1][0]))
count += 1;
}
return count;
}
fn parse_range(line: []const u8) ![2][2]u8 {
var r = std.mem.zeroes([2][2]u8);
var parts = std.mem.split(u8, line, ",");
var p1 = std.mem.split(u8, parts.next().?, "-");
var p2 = std.mem.split(u8, parts.next().?, "-");
r[0][0] = try std.fmt.parseInt(u8, p1.next().?, 0);
r[0][1] = try std.fmt.parseInt(u8, p1.next().?, 0);
r[1][0] = try std.fmt.parseInt(u8, p2.next().?, 0);
r[1][1] = try std.fmt.parseInt(u8, p2.next().?, 0);
return r;
}
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