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const std = @import("std");
const print = std.debug.print;
pub fn solve(part: []u8, reader: *std.Io.Reader, _: std.mem.Allocator) !void {
if (std.mem.eql(u8, part, "1")) {
try part1(reader);
} else {
try part2(reader);
}
}
fn part1(reader: *std.Io.Reader) !void {
var output: usize = 0;
while (reader.takeDelimiter('\n')) |line| {
if (line.?.len == 0){
break;
}
var max1: usize = 0;
var in1: usize = 0;
var max2: usize = 0;
for (line.?, 0..) |b, index| {
const value: u8 = b - '0';
if (value > max1) {
max2 = max1;
max1 = value;
in1 = index;
} else if (value > max2) {
max2 = value;
}
}
if (in1 < line.?.len - 1){
max2 = 0;
for (line.?[in1 + 1..]) |b| {
const value: u8 = b - '0';
if (value > max2) {
max2 = value;
}
}
output += max1 * 10 + max2;
} else {
output += max2 * 10 + max1;
}
} else |_| {
}
print("{d}\n", .{output});
}
fn part2(reader: *std.Io.Reader) !void {
var output: usize = 0;
while (reader.takeDelimiter('\n')) |line| {
var joltage: usize = 0;
if (line.?.len == 0){
break;
}
var last_index: usize = 0;
for (0..12) |i| {
var max: usize = 0;
var max_index: usize = 0;
for (line.?[last_index .. line.?.len - 11 + i], 0..) |b, index| {
const value: u8 = b - '0';
if (value > max) {
max = value;
max_index = index;
}
}
last_index += max_index + 1;
joltage *= 10;
joltage += max;
}
output += joltage;
} else |_| {
}
print("{d}\n", .{output});
}
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