AdventOfCode2021/source/day2/part1and2.d

50 lines
1.3 KiB
D
Raw Normal View History

2021-12-02 13:30:32 +00:00
module day2.part1and2;
2021-12-02 13:29:16 +00:00
import std.file;
import std.stdio;
import std.string;
import std.conv;
import std.typecons;
import std.traits;
2021-12-02 13:29:16 +00:00
/**
* Parses a submarine instruction.
* Params:
* op = The operation to parse.
* Returns: A tuple containing the operation string and the value.
*/
Tuple!(string, int) parseOp(S)(S op) @safe pure if (isSomeString!S) {
2021-12-02 13:29:16 +00:00
auto parts = op.split();
return tuple(parts[0].to!string, parts[1].to!int);
2021-12-02 13:29:16 +00:00
}
void dive() {
File f = File("source/day2/input.txt", "r");
int depth = 0;
int position = 0;
foreach (line; f.byLine) {
auto op = parseOp(line);
if (op[0] == "up") depth -= op[1];
if (op[0] == "down") depth += op[1];
if (op[0] == "forward") position += op[1];
}
writefln("Final depth: %d, Final position: %d, Product: %d", depth, position, depth * position);
}
void dive2() {
File f = File("source/day2/input.txt", "r");
int aim = 0;
int depth = 0;
int position = 0;
foreach (line; f.byLine) {
auto op = parseOp(line);
if (op[0] == "up") aim -= op[1];
if (op[0] == "down") aim += op[1];
if (op[0] == "forward") {
position += op[1];
depth += aim * op[1];
}
}
writefln("Final depth: %d, Final position: %d, Product: %d", depth, position, depth * position);
}