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const std = @import("std");
const example = @embedFile("example");
const input = @embedFile("input");
pub fn main() anyerror!void {
try std.testing.expectEqual(solve(example), 4);
const result = try solve(input);
try std.io.getStdOut().writer().print("{}\n", .{result});
}
fn solve(puzzle: []const u8) !u64 {
var it = std.mem.tokenize(u8, puzzle, "\n");
var tot: u64 = 0;
while (it.next()) |line| {
var it2 = std.mem.tokenize(u8, line, "-,");
const a = try std.fmt.parseInt(u64, it2.next() orelse unreachable, 10);
const b = try std.fmt.parseInt(u64, it2.next() orelse unreachable, 10);
const c = try std.fmt.parseInt(u64, it2.next() orelse unreachable, 10);
const d = try std.fmt.parseInt(u64, it2.next() orelse unreachable, 10);
if (a <= c and b >= d or a >= c and b <= d or a <= c and b >= c or a <= d and b >= d) {
tot += 1;
}
}
return tot;
}
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