~zanneth/aoc2022: Initial commit

24 files changed, 8194 insertions(+), 0 deletions(-)

A day1/day1.cpp
A day1/input.txt
A day2/day2
A day2/day2.cpp
A day2/input.txt
A day22/.gitignore
A day22/Cargo.lock
A day22/Cargo.toml
A day22/example.txt
A day22/input.txt
A day22/problem.txt
A day22/src/main.rs
A day3/day3
A day3/day3.cpp
A day3/input.txt
A day4/day4
A day4/day4.cpp
A day4/input.txt
A day5/day5
A day5/day5.cpp
A day5/example.txt
A day5/input.txt
A day6/day6.cpp
A day6/input.txt

A  => day1/day1.cpp +69 -0

@@ 1,69 @@
+#include <cmath>
+#include <cstdint>
+#include <cstdlib>
+#include <cstring>
+#include <fstream>
+#include <iostream>
+#include <string>
+#include <sysexits.h>
+
+using namespace std;
+
+int my_atoi(const char *str)
+{
+    int r = 0;
+    int sign = 1;
+    const size_t len = strlen(str);
+    
+    for (unsigned i = 0; i < len; ++i) {
+        const char c = str[i];
+        if (c == '-') {
+            sign = -1;
+        } else if (c >= '0' && c <= '9') {
+            int digit = c - '0';
+            r += int(pow(10.0, double(len - i - 1))) * digit;
+        } else {
+            return 0;
+        }
+    }
+    
+    return sign * r;
+}
+
+int main(int argc, const char **argv)
+{
+    if (argc != 2) {
+        fprintf(stderr, "usage: %s <input-file>\n", argv[0]);
+        exit(EX_USAGE);
+    }
+    
+    ifstream f(argv[1]);
+    
+    const size_t max_cals_buckets = 3;
+    size_t max_cals[max_cals_buckets] = {0};
+    size_t cur_elf_calories = 0;
+    
+    for (string line; getline(f, line);) {
+        if (line.empty()) {
+            for (size_t i = 0; i < max_cals_buckets; ++i) {
+                if (cur_elf_calories > max_cals[i]) {
+                    max_cals[i] = cur_elf_calories;
+                    break;
+                }
+            }
+            cur_elf_calories = 0;
+        } else {
+            cur_elf_calories += my_atoi(line.c_str());
+        }
+    }
+    
+    size_t sum = 0;
+    for (unsigned i = 0; i < max_cals_buckets; ++i) {
+        printf("bucket[%u] = %zu\n", i, max_cals[i]);
+        sum += max_cals[i];
+    }
+    printf("sum = %zu\n", sum);
+    
+    return 0;
+}
+

A  => day1/input.txt +2251 -0

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\ No newline at end of file

A  => day2/day2 +0 -0

A  => day2/day2.cpp +162 -0

@@ 1,162 @@
+#include <cmath>
+#include <cstdint>
+#include <cstdlib>
+#include <cstring>
+#include <fstream>
+#include <iostream>
+#include <string>
+#include <sysexits.h>
+
+using namespace std;
+
+enum Shape {
+    ROCK,
+    PAPER,
+    SCISSORS,
+};
+
+enum Outcome {
+    WIN,
+    LOSE,
+    DRAW,
+};
+
+static Shape from_opponent_strategy(char c)
+{
+    switch (c) {
+    case 'A': return Shape::ROCK;
+    case 'B': return Shape::PAPER;
+    case 'C': return Shape::SCISSORS;
+    default:  throw runtime_error("invalid opp shape");
+    }
+}
+
+static Shape from_player_strategy(char c)
+{
+    switch (c) {
+    case 'X': return Shape::ROCK;
+    case 'Y': return Shape::PAPER;
+    case 'Z': return Shape::SCISSORS;
+    default:  throw runtime_error("invalid player shape");
+    }
+}
+
+static Outcome from_raw(char c)
+{
+    switch (c) {
+    case 'X': return Outcome::LOSE;
+    case 'Y': return Outcome::DRAW;
+    case 'Z': return Outcome::WIN;
+    default:  throw runtime_error("invalid outcome");
+    }
+}
+
+static size_t score_for_shape(Shape s)
+{
+    switch (s) {
+    case Shape::ROCK:       return 1;
+    case Shape::PAPER:      return 2;
+    case Shape::SCISSORS:   return 3;
+    }
+}
+
+static Shape shape_for_outcome(Shape opp, Outcome outcome)
+{
+    switch (outcome) {
+    case Outcome::WIN:
+        switch (opp) {
+        case Shape::ROCK:        return Shape::PAPER;
+        case Shape::PAPER:       return Shape::SCISSORS;
+        case Shape::SCISSORS:    return Shape::ROCK;
+        }
+        break;
+        
+    case Outcome::LOSE:
+        switch (opp) {
+        case Shape::ROCK:        return Shape::SCISSORS;
+        case Shape::PAPER:       return Shape::ROCK;
+        case Shape::SCISSORS:    return Shape::PAPER;
+        }
+        break;
+        
+    case Outcome::DRAW:
+        return opp;
+    }
+}
+
+static bool is_win(Shape player, Shape opp)
+{
+    return player == shape_for_outcome(opp, Outcome::WIN);
+    
+    /*
+    if (player == opp) {
+        return false;
+    }
+    
+    return (
+        (player == Shape::ROCK && opp == Shape::SCISSORS) ||
+        (player == Shape::PAPER && opp == Shape::ROCK) ||
+        (player == Shape::SCISSORS && opp == Shape::PAPER)
+    );
+    */
+}
+
+static size_t score_for_p1(Shape player, Shape opp)
+{
+    size_t base_score = 0;
+    if (player == opp) {
+        // draw
+        base_score = 3;
+    } else if (is_win(player, opp)) {
+        // win
+        base_score = 6;
+    } else {
+        // loss
+        base_score = 0;
+    }
+
+    return base_score + score_for_shape(player);
+}
+
+static size_t score_for_p2(Shape opp, Outcome outcome)
+{
+    size_t base_score = 0;
+    switch (outcome) {
+    break; case Outcome::WIN:   base_score = 6;
+    break; case Outcome::LOSE:  base_score = 0;
+    break; case Outcome::DRAW:  base_score = 3;
+    }
+    
+    return base_score + score_for_shape(shape_for_outcome(opp, outcome));
+}
+
+int main(int argc, const char **argv)
+{
+    if (argc != 2) {
+        fprintf(stderr, "usage: %s <input-file>\n", argv[0]);
+        exit(EX_USAGE);
+    }
+    
+    ifstream f(argv[1]);
+    
+    size_t p1_score = 0;
+    size_t p2_score = 0;
+    
+    for (string line; getline(f, line);) {
+        char col1, col2;
+        sscanf(line.c_str(), "%c %c", &col1, &col2);
+        
+        Shape player = from_player_strategy(col2);
+        Shape opp = from_opponent_strategy(col1);
+        p1_score += score_for_p1(player, opp);
+        
+        Outcome outcome = from_raw(col2);
+        p2_score += score_for_p2(opp, outcome);
+    }
+    
+    printf("part1 score = %zu\n", p1_score);
+    printf("part2 score = %zu\n", p2_score);
+    
+    return 0;
+}
+

A  => day2/input.txt +2500 -0

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A  => day22/.gitignore +1 -0

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A  => day22/Cargo.lock +7 -0

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+name = "day22"
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+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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+
+42L16R50R47L35L8L9L30L12R41L5R42L31R30L36R37L8R16R12L43L27R15R18L18L38R39R2L22R17L34R12L32L50R37L9R22L36R4L35R29L26R15L34L4L32R1R12L30R38R30L40L20L47L46R29L21R48L23L34R41L18R36R47R16L31R8L20L24L29R26L2R23L46L48L33R46R47L15R39L38L15L3R36L39L40L5L30R27R42L12L3R42L1R28R42L50R8R15R39L29L38R10L37R49L25L45R3L44R29L16R30L48L29L22L42R44L36R12R38R44R29L18L37R39L47L4L49L18R32R34L45L15R11R28L21R35L20L40L8L2R16L21L30R9R21L44L33R40L50R15L38R49L40L13L3L5L16L23L26L27L12R41L40R33L15L28L43R16R4R9R7L16R48R4R46L5R29R7R35R17L30L32R37L19L49R45R4L43R28R1L23L33L11R31R30R30R47R25R9R16L43L40L8L9L12R47R32R33R36L8L2L26R29R5R32R11R45R14L31R30L10L16R27R26R10R2R50R37L9L12L13R38R27R21L30L21R37R5L44L1L33R43R5R31R30R11L38L9L35L21R37R7R50L26R18L32R21R45R22R29L40R36L27R15R27R38R27R12R14R23L6L33L4R4L38R17L38R44L33L38L43R14L11L47L18R2R40R26L30R10L5L28L14L23L46L29L1L35L24R33L14R33R29L37R6L49L33R6L37R4L7L33L29R12L28R24L1R20R36L8L34L17L20R41R1R34R3L38R20R35R21L7R34L44L9R39L30R22L36L45L4R49R39R21L22L29R5L5L40L17L40R40R5L45R37R42R42R15L38L17L4R30R5R16R42R12L22R24R12L45R49R49L37R10R16L27L9R19R13R42R46L9L37R47L11L23R19R25L29R28L36L13R24R25L20R12L44L11L42R47L8L20L35R10L49R22L33L25R46L29L19R40R15L24L33R29R48L39R30L25L8L26L26L10L12R50L10L32R6R19R15L48L40L40L33R19L20L9R44R15R22R18L19R26R7L43L38L39L37R11L13R34R36R6R42R8R32R36R17R28R48L20L50R38R43L18L31L49R15L41R31L6R38L33L4L38R49R6L11L16L31L19R18R1R4R16R46L13R23L46L45L11L40L18L21L38L33R22R16L47L10L48R32R16R5L2R21R22R33R32L18L41L40R46R2L29R24L24R14R42L44L24R32R5R16R5L29R40R32L30L19L47R39L48R35R26L47R40L9R47R43R50L1R47R10L43R39L37L24L7R33L38R37R10R39L13L3R4R29R25R10R43R35L40L41R36R31L11L18R14R41R23R32L40R14L45L22L42L38R43R11L43L16R48L1L6R2R2L5L18R21L42R38L10R48L4R32R38L33R16R33L23L29L43R19R41R15L11L1L43R33R49L43R22R20L18L30R18L43R41R6L40L50R6R48R16L27L4L32R27R4R10R13R41L47R30R44L19L28R38R35R5L26R46R10R19L38R40R9R50R43R7R36L29L20R5L16L37L24L46L6L49L2L40L39L18L9R46L42R48L8L47R10R9R48L26R40L23L42L25R30R17R33R4R40R46R23L15R2L47R40L3R18L14L29R9R19L2R12R19R20R2R27L17R5R22R30R10R1L42R48L26R15R18R43R44R23L6L24R35L45L3L8R43L48R50L8R8L19L12R45R29L5L13R20L15R3L33L39L38L30R2R37R31R48R18L13L36R47L37L16L29R38R27R27L27L21R16R50R12R9R36L6L4R48R39L41R5L11L47R22L20L12L26L43R19L34R1R19R44L48R8R32L36R47R8L22L18L48L32R9L42R14R32L35L36R48R42R36L4R42R44L19R1R35L17R48R23R49L27L13L5R5L14L24R35R6L20R2L50L31R16L28R39L36R44R6L1R28L38L22R13R12R46L34L39L44R49R48R8R26L9R17R6L38L26L50L31R18L42L46R15L26R43L8L41L30R33R33R46L37R44L35R1L1R1L15L43L16L33L22L15L32L43R43R30R49R2L26R46R18L2R39R1R28L2L42R42L2L21L41R41L1L3R37R6R21L29R8L26R46L36R22L14L23L12L12L9L42R17R41R26L3L27L25L11L6L32L1R41L11R40R47R35L45R15R38L1L1R28R12R17L43L14R17L17R4L42L46R43L46R41R32L12R22R4L25L23R14L5L43R22L40R4R50R36R24L26R27R15L34R44R1R43R43R7R7L10L4R27L12R29R5L48L26L20R26L9L13L32L48R34L29R33R22L35R42R41R19R37L16R24L33R5L10R14R28L5L46R42L11L16L44R5R27L21L38R36R33R45R10L40R35L37R3L37L37L6R27R41L45L21R1L2L5R15L33R26L14L10L29R32L24L7L9L3R49L32R37R23L10R42L33L16L18L13L34R23R17R46L45L29L18L6R34R29L34L10L27L27L47R27L37R28L10R14R48L19L11R24R24L38L6R23R13R19L11L34L19L23R12L5R26L22R36L16R47L23R24R29R40L43R15R9L2L45L35R32R27L41L45R17L17R17L9L29L22R26L19R47R4L2L23L37R40L3L28R29R9L24L14R50R43L18L19R15L27L46L47L31L50L44L29R14R8R17R12R8R16R35R11R41R11L2L43L35L15L14R10R44R25R45L42L29L27L14R10R30R26L5L23R46R31L43L44R29R22L24L34L14R36R15L16R20R31R4L14R45L24L22R50R10L10L36L35R11R12L29R33R4R18R16R34L44R33R10L5L23R48R19R18L25L23L36R27L1R28R49R43L24L22L40R5L26R22L8R49L48R18R21L43L43L43R26R21R46L21R8L48L5R24R16R27L16R50L41R13R9L7R24R35R23L7R14L16R39L7R22R34R36R3R48L22R22R29L22L27L8L18L30L30L42R42R47R12R49R8L5R5L47L45R7R36L31L39R23L9R18L5L38L49R4R6R22R17R4L34R40R48R23L37L6L43L37R10L30R39L22L11L30L30L24L31L30L34L26L17R39R23L31L24L30R1L23L9R21R40R27R42L24L48R34L15L17R39R11R30R27L28L38L14R26L20L41R20L48L33R41R26L1L34L43L20L12L38L32R8L17L23R46L24R13R29R1R13L33R21R8R36R35R7R24L38L39L27L49L4R28R31L49L45L3R6R17L43R21L8L10L46R17R43R45L12R25R18L41L28L46L38L4R46R22R25L26L11R48L1L10R39R41R13R48L10R40R45R35L45R24R30L29L14L12R9R12L33R13L21R23L22L32L6R34L27L42L31R8L24L23L34L27L37R27R4L20R2L22R17R29L1L25L30R11R6L44R8L14R11L32L28L34L4R17L29R24L20R46R12R14R43R46R11L35R23L12R43L46L35R48L36L25R41R46L33R43R41L32L16L1L25R17R42R44L34R6R37L49R29L21L47L45R39L46L26R2L49L49R7R36R18R39L49L45R45L10R27R13R3L10L17L14R34R22R17L49L34L24R39R37R26L28L24R2R30R40R17R46L27R11L9L20L18L41L5L31R3R45R28R6L32L34L46L4L13L29R50R15R14R26L36R48R12L13R10R29R31R47L49R9L18R50L1L2L46R33L14R21R33L44L18R9L34L39L29L17L49R6R1R41R7R12R45R13R41L24L50L35R21R5R25R2L42L24R42L31R48L4L34R48L15R43L40R30L7R24R47L42L7R44L12L30L24R5R39R26L17L46L14R15L23R4L48L8R37L27L29L24R11L37L18R38L35R8R7R36R22L35R8R18L49R41R46R24R11L47L50L15L38L38L11R39R44L36L2L40L47R39R42R11R35L9R13R36L46R36R22R42R19L20L31R7L21R11L37L6R28R3L26R12L14L47R22L8L24R47R42L29L9R36L46R41L12L2R40L32R34L15R13R21R22L44R48L26L2L47R49R6R33R28R12L39R43L25R33R10R9L14L50R5L10R9L10R46R18L25L17R9R5R4L27R25L2R14L7L48L17L50R3L28R36R47L38L13R49L9R43R5L22L22L50L7R4R5R39R21L24R6L8L42L28L18L41L13R21R20R3L6L7L20R10R33R10R49L18R2L35L16R24R4L9R17R39L44R41L16L17R18R10R35R31R25L43L29R32R4R21L38R5L16L15R11L26R38L14R41R14R4R47R1R5R31R38L7L23L25L8L48R10R46L50L27L24L43R32L28L13R26R40L41L10L14R38R45L10L26L35L17L12R31R48L25R5R26L20R38R28R46L39R36R37L44R4R48L30R24R3L4R23R41R29R29L1L47L36L41R47R20L31R35L10L12R13L37L38R29L31L23L12L47L26L31L49L3R23R48R41L38L31L27L44R26R38R17L18R38R4R9R39L18R3L12R20L1L23L16R30R16L6R44L45R26R2R50L21R15R21R14R4R18R21L1R14L18L13L40R47R3L11R50L50L42L10R32L30L8R35R33L44R50R43R2L1R14L31L32R11R22L5L27L41L43L27L29R17R21R7R12R14R38L45R21L21R48L16R6R30R28R6R16L19L45L17R45R12L20L18L13L23L35R17L39L33L29R32R35L25L28R50L7R46L14L28L20R43R47R32R9R50R47L33R31R25<
\ No newline at end of file

A  => day22/problem.txt +66 -0

@@ 1,66 @@
+--- Part Two ---
+As you reach the force field, you think you hear some Elves in the distance. Perhaps they've already arrived?
+
+You approach the strange input device, but it isn't quite what the monkeys drew in their notes. Instead, you are met with a large cube; each of its six faces is a square of 50x50 tiles.
+
+To be fair, the monkeys' map does have six 50x50 regions on it. If you were to carefully fold the map, you should be able to shape it into a cube!
+
+In the example above, the six (smaller, 4x4) faces of the cube are:
+
+        1111
+        1111
+        1111
+        1111
+222233334444
+222233334444
+222233334444
+222233334444
+        55556666
+        55556666
+        55556666
+        55556666
+You still start in the same position and with the same facing as before, but the wrapping rules are different. Now, if you would walk off the board, you instead proceed around the cube. From the perspective of the map, this can look a little strange. In the above example, if you are at A and move to the right, you would arrive at B facing down; if you are at C and move down, you would arrive at D facing up:
+
+        ...#
+        .#..
+        #...
+        ....
+...#.......#
+........#..A
+..#....#....
+.D........#.
+        ...#..B.
+        .....#..
+        .#......
+        ..C...#.
+Walls still block your path, even if they are on a different face of the cube. If you are at E facing up, your movement is blocked by the wall marked by the arrow:
+
+        ...#
+        .#..
+     -->#...
+        ....
+...#..E....#
+........#...
+..#....#....
+..........#.
+        ...#....
+        .....#..
+        .#......
+        ......#.
+Using the same method of drawing the last facing you had with an arrow on each tile you visit, the full path taken by the above example now looks like this:
+
+        >>v#    
+        .#v.    
+        #.v.    
+        ..v.    
+...#..^...v#    
+.>>>>>^.#.>>    
+.^#....#....    
+.^........#.    
+        ...#..v.
+        .....#v.
+        .#v<<<<.
+        ..v...#.
+The final password is still calculated from your final position and facing from the perspective of the map. In this example, the final row is 5, the final column is 7, and the final facing is 3, so the final password is 1000 * 5 + 4 * 7 + 3 = 5031.
+
+Fold the map into a cube, then follow the path given in the monkeys' notes. What is the final password?

A  => day22/src/main.rs +662 -0

@@ 1,662 @@
+#![allow(unused_parens)]
+
+use std::convert::TryInto;
+use std::env::args;
+use std::fmt::{Display, Formatter, Write};
+use std::fs::File;
+use std::io::{BufRead, BufReader, Seek};
+use std::ops::Range;
+use std::process::exit;
+use std::str::FromStr;
+
+// -------------------------------------------------------------------------------------------------
+
+const FACE_DIM:       usize = 50;
+const NUM_FACES:      usize = 6;
+const FACES_PER_LINE: usize = 3;
+const DEBUG:          bool  = false;
+
+// -------------------------------------------------------------------------------------------------
+
+enum Mode {
+    Part1,
+    Part2,
+}
+
+// -------------------------------------------------------------------------------------------------
+
+#[derive(Copy, Clone, PartialEq)]
+enum Dir {
+    N,
+    S,
+    E,
+    W,
+}
+
+impl Dir {
+    fn apply_rot(&self, rot: &Rot) -> Dir {
+        use Dir::*;
+        match rot {
+            Rot(N) => *self,
+            Rot(S) => match self {
+                N => S,
+                S => N,
+                E => W,
+                W => E,
+            },
+            Rot(E) => match self {
+                N => E,
+                S => W,
+                E => S,
+                W => W
+            },
+            Rot(W) => match self {
+                N => W,
+                S => E,
+                E => N,
+                W => S
+            }
+        }
+    }
+
+    fn value(&self) -> i32 {
+        use Dir::*;
+        match self {
+            N => 3,
+            S => 1,
+            E => 0,
+            W => 2
+        }
+    }
+}
+
+impl Display for Dir {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        use Dir::*;
+        let c = match self {
+            N => '∧',
+            S => '∨',
+            E => '>',
+            W => '<'
+        };
+        f.write_char(c)
+    }
+}
+
+#[derive(Copy, Clone, PartialEq)]
+struct Rot(Dir);
+
+// -------------------------------------------------------------------------------------------------
+
+#[derive(Copy, Clone, PartialEq)]
+struct Pos {
+    x: i32,
+    y: i32,
+}
+
+impl Pos {
+    fn apply_dir(&self, d: &Dir) -> Pos {
+        use Dir::*;
+        match d {
+            N => Pos { x: self.x, y: self.y - 1 },
+            S => Pos { x: self.x, y: self.y + 1 },
+            E => Pos { x: self.x + 1, y: self.y },
+            W => Pos { x: self.x - 1, y: self.y },
+        }
+    }
+
+    fn apply_rot(&self, rot: &Rot, face_dim: i32) -> Pos {
+        use Dir::*;
+        match rot {
+            Rot(N) => *self,
+            Rot(S) => Pos { x: face_dim - 1 - self.x, y: face_dim - 1 - self.y },
+            Rot(E) => Pos { x: face_dim - 1 - self.y, y: self.x },
+            Rot(W) => Pos { x: self.y, y: face_dim - 1 - self.x },
+        }
+    }
+}
+
+#[derive(Copy, Clone, PartialEq)]
+struct GlobalPos {
+    face_id:    FaceID,
+    local:      Pos,
+    dir:        Dir,
+}
+
+// -------------------------------------------------------------------------------------------------
+
+#[derive(Copy, Clone, Debug)]
+enum Tile {
+    Open,
+    Wall,
+}
+
+impl Tile {
+    fn from_char(c: char) -> Option<Self> {
+        use Tile::*;
+        match c {
+            '.' => Some(Open),
+            '#' => Some(Wall),
+            _   => None
+        }
+    }
+}
+
+impl Display for Tile {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        use Tile::*;
+        let c = match self {
+            Open => '.',
+            Wall => '#'
+        };
+
+        f.write_char(c)
+    }
+}
+
+// -------------------------------------------------------------------------------------------------
+
+#[derive(Clone, Debug)]
+struct InputRange {
+    h: Range<usize>,
+    v: Range<usize>,
+}
+
+impl InputRange {
+    fn new(h: Range<usize>, v: Range<usize>) -> Self {
+        Self { h, v }
+    }
+}
+
+// -------------------------------------------------------------------------------------------------
+
+#[derive(Copy, Clone)]
+enum Turn {
+    R,
+    L,
+}
+
+impl Turn {
+    fn from_char(c: char) -> Option<Self> {
+        use Turn::*;
+        match c {
+            'R' => Some(R),
+            'L' => Some(L),
+            _   => None
+        }
+    }
+}
+
+// -------------------------------------------------------------------------------------------------
+
+#[derive(Copy, Clone)]
+enum Instr {
+    Move    (u64),
+    Turn    (Turn),
+}
+
+// -------------------------------------------------------------------------------------------------
+
+#[derive(Copy, Clone, Debug, PartialEq)]
+struct FaceID(u8);
+
+#[derive(Clone, Debug)]
+struct Face {
+    id:          FaceID,
+    input_range: InputRange,
+    tiles:       [[Tile; FACE_DIM]; FACE_DIM],
+}
+
+impl Face {
+    fn parse(s: &String, id: FaceID) -> Self {
+        let input_range = Self::input_range(id);
+        let mut tiles = [[Tile::Open; FACE_DIM]; FACE_DIM];
+
+        for y in 0..FACE_DIM {
+            for x in 0..FACE_DIM {
+                let input_x = input_range.h.start + x;
+                let input_y = input_range.v.start + y;
+                let char_idx = (input_y * FACE_DIM * FACES_PER_LINE) + input_x;
+
+                let c = s.as_bytes()[char_idx] as char;
+                let tile = Tile::from_char(c).expect("invalid input");
+
+                tiles[y][x] = tile;
+            }
+        }
+
+        Self {
+            id,
+            input_range,
+            tiles
+        }
+    }
+
+    fn input_range(id: FaceID) -> InputRange {
+        let (horiz, vert) = match id {
+            FaceID(1) => (50..100,   0..50),
+            FaceID(2) => (100..150,  0..50),
+            FaceID(3) => (50..100,   50..100),
+            FaceID(4) => (50..100,   100..150),
+            FaceID(5) => (0..50,     100..150),
+            FaceID(6) => (0..50,     150..200),
+            _ => unreachable!()
+        };
+
+        InputRange::new(horiz, vert)
+    }
+
+    fn tile(&self, p: &Pos) -> Tile {
+        let (col, row) = (p.x as usize, p.y as usize);