mcmillen/adventofcode
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

day 3 solution

Browse Source
This commit is contained in:
Colin McMillen 2020-12-03 10:46:44 -05:00
parent bd144bd7e8
commit 13f7672ca6
3 changed files with 387 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
2020/Day03.cs Normal file
View File

@ -0,0 +1,63 @@
using System;
using static System.Console;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Xunit;
namespace AdventOfCode {
public class Day03 {
static int CountTreeIntersections(string[] lines, int dx, int dy) {
int count = 0;
int x = 0;
int y = 0;
while (y < lines.Length - 1) {
x += dx;
y += dy;
string line = lines[y];
char tile = line[x % line.Length];
if (tile == '#') {
count++;
}
}
return count;
}
static int Part1() {
string[] input = File.ReadAllLines(Util.RootDir + "day03.txt");
return CountTreeIntersections(input, 3, 1);
}
static long Part2() {
string[] input = File.ReadAllLines(Util.RootDir + "day03.txt");
long result = CountTreeIntersections(input, 1, 1);
result *= CountTreeIntersections(input, 3, 1);
result *= CountTreeIntersections(input, 5, 1);
result *= CountTreeIntersections(input, 7, 1);
result *= CountTreeIntersections(input, 1, 2);
return result;
}
[Fact]
public static void Test() {
string[] example =
@"..##.......
#...#...#..
.#....#..#.
..#.#...#.#
.#...##..#.
..#.##.....
.#.#.#....#
.#........#
#.##...#...
#...##....#
.#..#...#.#".Split('\n');
Assert.Equal(7, CountTreeIntersections(example, 3, 1));
Assert.Equal(218, Part1());
Assert.Equal(3847183340, Part2());
}
}
}

3
2020/Program.cs
View File

@ -19,8 +19,7 @@ namespace AdventOfCode {
public class Program {
static void Main(string[] args) {
Day01.Test();
Day02.Test();
Day03.Test();
}
}
}

323
2020/day03.txt Normal file
View File

@ -0,0 +1,323 @@
....#...##......##..#..#.#...#.
..######...#......#....#..#.##.
..#.#...##......#.#..#..#....#.
..#.....#..#.#........#.#..#..#
#......##..###...#.#..#.....#..
#.......##...###...#....#......
.....##...#......##.#.#..#.##..
.........#......#.....#......#.
..#.#..#....#....#......##.#.##
.#...#..#.............#.#..#.#.
....#..#.#.##.#....#..#..#....#
...#..#.....#.......#...#..#..#
.....#.....#.......#..#...#....
.##.......#...#..#........#...#
...#.......#.#.#...#.#.#......#
#....#..#.....#......##....#..#
###.#......#.#.#.#..#....#....#
......##......#.#...#...#..#...
.....#......#.#.#......#.#.....
...##...#..#........#..#.##....
..##.#.#..#...###..........#.#.
.#..#..#.....#.........#.###.#.
....##.....#...#...##..#.##...#
....#.##....#.....##......#....
........#.#.........#.#.......#
#....##.#....#..#...#..........
#..###......#....##..........##
....##.#.....#..#.##......#....
#..#......#......#.............
...##.....##.......#.......#...
#...#.#.....#..........#...###.
#.....#..#.#.###...#......###..
...##.#......#........#..#.....
......#.....###.#...##........#
.#......##......##....#....#...
..#.#..#.....##....#....#..#...
..#.#.....#.##.#.....#.....#...
....#.......#...#.........##...
.#....#..#.......##.......#....
..#..##.....#...##.##.#.#......
.##.#....#............#.......#
.......#...#..#.#.##.....##..##
..###....#..#.##........##.#...
....#.#..#.....#..#.#.....#....
..#..#.#..............#..#.....
.......#.#.#.........#......#..
...##..#.#...#......##.#.......
#....#.#.........#...#....#..##
.#..#.#...#.......#.#.#....#.##
.#..###.#..#.#.....#..#........
#.#..##.###.....##.........#..#
#...##...#..##..#..#..........#
.#...#..#......................
...##..###...........#.#...##..
..........#.#....#.#...........
..#....#....#..#....#.#.#......
.#..#.....###......#...#...#...
#.##..#..#.........#..#....#...
........#......#...#.........#.
..#.....#.#..##...#.#.#...##...
..#...........#.##..#.#..#.##..
..............##...#.#......#..
#.#..#....#...##.###........#..
.#...#..#........#........##..#
.....##..#...#.....#.#.........
.#...#...#....###...#.#.#..##..
....#.........#....###..##....#
.#....#...####...##....####.#..
..#..#.......#..#......#.#.#...
....#....#.......##..#.#.......
..#....#...........##.#.##.....
#..#..#...##.##....#.#.#.###.##
...#...#....#.#...##...#....###
......##........#.........#.#..
....#####..#..##.......#.#....#
....##..#...###....#..#.....#..
..#........#..#.#.....#....#...
..#....#......#..#...#......#..
...#.....##...#.#..##.....#..#.
...#..#.......####.##...#......
.....#..#..#.##..##....#..#.#..
..#..#..##.#.#.##..#..#...#....
...#..........#.........#....##
.##.....###...............#.##.
...##...........#.#.#......#..#
.#...#.#.##....#....#..#.......
.#...###.#....#..#..#..#......#
#..#........###...........#..#.
..#...#......#.#.#......####.#.
...#.#....##.#.....#.....##....
...###..#.#.#...#.....#.###..#.
.#.#..#...##......#..........#.
##.....#.......#.#..###...#.#..
##.###....#.....#.....###.#....
#...#..##....#.#...#...#......#
.....##.#........#.###.........
.#..#..#.#......##.#...#.#.....
#..#.#........##...........##.#
#...###..#..####..#.#..........
..#...#....#...##.#....#....##.
......#.#........#.....#..#....
#.........#...#.....#...#..##..
#....#.........#...#.##..###.#.
#...###...#.##.#.#.............
#.#....#....#......#....#.#...#
##...#.##......#..#.#....#.....
....#...#.##....#..............
.........##..........#..##..#..
......##....#.#......#.........
..#.#..............#......#..##
...........##.......#.#.#......
##...#........##.......#.#.....
....#...#...#....#.#......##...
...#..#.#.#.........#..#.#....#
.##.#...#.#.........#.....##.#.
#.#.....#.#.....#..............
..#.#..#....#..........#..##...
...#..#....................#..#
...........#...........#...#..#
............#...#............##
..#....##......##...........#..
..#..#..#....#....##......##.##
##..........#..##.##.#...#.....
............#..#........###.#..
###...##.#.#....#....#.#....#..
...#......##...#.......####....
.......#..#..#.#.....#.........
........##.......##.....#......
#.#...#.###....#..#...##.......
...#.#....#..#####.#..##.#.....
..#.#..##.......###...#.....#..
..#.......#..#...#...#..#.##...
......#..#.......#.....#....#..
.......#........#.#.......##..#
.#.#.....#.......#.......##..#.
..#.#....#.#.#####.....#...#...
#..#............###.......#..#.
........##.........#..#...###..
.#............##...#.....#.....
.#..##..#....#....#.......#....
....##..........##.............
.##..........#..#..#....#...#..
...#..#..#............####.....
.............#..#.##..#.#.##...
.....#........#....#.#.......#.
###.#..#.#...#....##...........
....#......#...#....##.......#.
.......#.#...#.#...#........##.
..........#........#..#.##.....
##..#.#.....##.#...............
.....#....#................#...
...##....#........##.#....#....
.....##...###....#.#..#.......#
.....#.#.........##....###.....
.#.....##......#..##..##...##.#
.#..............#.....#.#......
.##......#..#..#......##.......
.......#..................#....
...#.#...##......####.........#
#....#####.#.#..#..#..#...#...#
##.#...#.......#....#...#...###
...#........#.....#...#.##.....
..##....#.......#....#.......##
#......#..##...#..##.#.....#.#.
..###........#.#..#........#.#.
...#.###..........#.....#.#.#..
#.###.....#...#...#..##..###...
#....#.#.....#.#........#......
........#.......##.......#.....
...........#...#......##.......
............#...#....#..#.....#
#.#.#.#....#.....#.#..........#
#.##...#...#..#....##.#.......#
...#..#......#..#...##..##..#..
#....#......#.#.....##.#..#....
#....#..##.#......#.#.....#..##
.#..##....##....#.#...#...#....
#.#.###....#.#............#...#
.#.#....#..#..........#....#.#.
......#..#.#...............##..
..#......###.#..........#.###..
....#.##.#..#...##..#.#...#....
..............#...##.......#.##
.#...........#....#....#.##....
#..#....#.....#...#.....##...#.
.........#...#.##.......#...#.#
.....#......#.........#.#..#...
##..........#.#..##...#.#.#....
##..##.#..#..#.....#.##....#...
........##....#.#.#....#......#
.#.##...#.###....#.........#..#
..........#....###..#.........#
#.#..#.#...#.......#..##.......
..#....#...###..............##.
#..###.....####...#..#..#...#..
......#..#...###........###....
..#.....#...#.......#....###..#
.#.........#.#.#....#.#.......#
#.#.###.#.#...........#........
......#..#.........#........#..
...........##.#........#.#...#.
.....#.#......##.......#.....##
...##...#............#..#.....#
.....#..##....##...##.#..#.#...
...#...#........#.#......##....
........#..##..#..#......##.#..
.#.#.....#.....#...........#.##
.#...#.#............#......#...
.....#...#........#....#..#.#..
...##....#..#...#..............
#....##.#.#............#.......
#..#..#.....##..#........##.#.#
##..#.#....#....##.......###..#
.#.#.#.....###.....#.#......###
.....#..#...###...#....#.#...#.
.##.....................##....#
.#.....#.........#....#.....##.
#...#....#.#...###.......#.#..#
...#.................#.#....#.#
.##...#.#......................
.##.#........#...##............
.#....#.....#.........#.##..##.
#......#...##..#.........##.##.
......#......#...####..#.##....
.###....#..##......#.##......#.
..#...#....#..#.......#.#......
#....#...#.................#.#.
....#.#.#..#...#..#.......#.#.#
#.#...##.......#.....##.#......
#.........#.....##..##..#......
....#..##..#.....#..#..#.#..#..
......#.#..#.#.#....#.#.......#
.##......#..#....##...##..#....
..#..#......#...##..#.##.....#.
..#..#.......#.#....#.....#...#
....#.#.....###...#.......#.#..
..#....##.....##.#........##...
#...............##....#.....##.
.#.........#....#...##.###.##.#
.#.##..#.............#.#.#..#..
.#.....#.................##....
..####.........#.#......#.#..#.
#.......#..........#.#........#
.#.#...##.....#.#.......#....#.
..#.##.#.......###....#....#...
.#....##.............##.#.#.#..
#.#.....#.#.#.#..#......##..#..
.............#..........#.#.#..
...#.#.............#.#...##....
.......#..#.#.......#..#.#....#
.............#.........###..#..
.#.#..#....#.....#..#.....#...#
#.....#....##..##.#..#........#
..##..###.....##....#.#..#.....
..#...##....#...#.#..........#.
...##..##.#.....#....#.........
..#...#........##.#..#........#
#.............#.###......#.##..
.#...#........#...........#...#
..##.......#.#..##.##......#...
...#.#...##....##..#...........
.#......##........#....##....#.
.........#..#....#...#..##.##..
....#..#.#...#.......#.#.##....
...#.#......#.#..#..#.#....#..#
.......#........#.........###..
#.#..#.#.........##............
##..##..#.##..###...#.#...#....
.#....#.#..#...#....#.##.....#.
.#.#.#.#........##...#..#.#.##.
.#..#.#..#...........#..#......
..#.##.#...#....#.........#...#
.....##...#.#...#...#....#.....
..#..........#.#.#.......##.#..
#.#............#..#.....#..#...
..#...........##.#.##.#....#..#
#..####.....#............#.....
.##......#####.#..#.....#....#.
...##..#.#......#.#..#..#...##.
#....................#.##...#.#
...#............#.............#
....#.##..........#.....#......
....##..##....#.#..............
...........#....##.#.....#.....
....#.....#....#....#......#...
#...##........#...#........#.#.
........#.....##..#.##.#..#.#.#
....##......##....#.....##....#
...#.#........##.......#...##..
#......##..#.#.#....##......#..
..#.......#.......##..#.##.....
.#...#...#.#.............##....
......#.#.#.........##...#..#.#
.....#..####....#.##..........#
...#...#.#....#.....#..#.....##
.........#.......#......###....
........##..##..#.#.#...###...#
.#..##.#....#...##.....#.#.#...
........##...#...##..#.........
.........#.......#.##..#...####
#......#.....#..............#.#
##..##.#.##.....##...........#.
#.............#.........#......
...####.#.##..#.#.#.##.#......#
..#.....##....#...#............
#..............#......#...###..
..#..#.#...#.##.........##.....
..#...##..#........#..#.##..##.
......###...#..#....#..#.###...
...##.##.###.....##.#.......#..
#....#..###..#.......#.#.#..#..
..##.............##..##...###.#
.#.#..#.........#..........#...
.........#.#.....##...#..#...##
....#..#....#####..#...#..#....
...#.....#.....#...#.#..#.#....
.#..#.............#.......##.#.
...##.......#.#.....##......#..
...........##..#.##..###...#.#.
...........#...........#...#..#
..#....#.##.#..#..#...........#
..#.....##...#......#...#......
...###.###.....##..........#..#