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| 1 | package afdw.jt; | |
| 2 | ||
| 3 | import com.google.common.collect.ImmutableList; | |
| 4 | ||
| 5 | import java.util.Arrays; | |
| 6 | import java.util.List; | |
| 7 | import java.util.concurrent.atomic.AtomicInteger; | |
| 8 | import java.util.stream.Collectors; | |
| 9 | import java.util.stream.LongStream; | |
| 10 | ||
| 11 | public class Main2 {
| |
| 12 | private static final List<Shape> SHAPES = ImmutableList.<Shape>builder() | |
| 13 | .add( | |
| 14 | new Shape( | |
| 15 | "A", | |
| 16 | 1, | |
| 17 | 4, | |
| 18 | new boolean[][] {
| |
| 19 | {true},
| |
| 20 | {true},
| |
| 21 | {true},
| |
| 22 | {true}
| |
| 23 | } | |
| 24 | ) | |
| 25 | ) | |
| 26 | .add( | |
| 27 | new Shape( | |
| 28 | "B", | |
| 29 | 4, | |
| 30 | 1, | |
| 31 | new boolean[][] {
| |
| 32 | {true, true, true, true}
| |
| 33 | } | |
| 34 | ) | |
| 35 | ) | |
| 36 | .add( | |
| 37 | new Shape( | |
| 38 | "C", | |
| 39 | 3, | |
| 40 | 2, | |
| 41 | new boolean[][] {
| |
| 42 | {true, true, true},
| |
| 43 | {false, false, true}
| |
| 44 | } | |
| 45 | ) | |
| 46 | ) | |
| 47 | .add( | |
| 48 | new Shape( | |
| 49 | "D", | |
| 50 | 3, | |
| 51 | 2, | |
| 52 | new boolean[][] {
| |
| 53 | {false, true, true},
| |
| 54 | {true, true, false}
| |
| 55 | } | |
| 56 | ) | |
| 57 | ) | |
| 58 | .add( | |
| 59 | new Shape( | |
| 60 | "E", | |
| 61 | 2, | |
| 62 | 2, | |
| 63 | new boolean[][] {
| |
| 64 | {true, true},
| |
| 65 | {true, true}
| |
| 66 | } | |
| 67 | ) | |
| 68 | ) | |
| 69 | .add( | |
| 70 | new Shape( | |
| 71 | "F", | |
| 72 | 3, | |
| 73 | 2, | |
| 74 | new boolean[][] {
| |
| 75 | {true, true, false},
| |
| 76 | {false, true, true}
| |
| 77 | } | |
| 78 | ) | |
| 79 | ) | |
| 80 | .add( | |
| 81 | new Shape( | |
| 82 | "G", | |
| 83 | 2, | |
| 84 | 3, | |
| 85 | new boolean[][] {
| |
| 86 | {true, true},
| |
| 87 | {false, true},
| |
| 88 | {false, true}
| |
| 89 | } | |
| 90 | ) | |
| 91 | ) | |
| 92 | .add( | |
| 93 | new Shape( | |
| 94 | "H", | |
| 95 | 3, | |
| 96 | 2, | |
| 97 | new boolean[][] {
| |
| 98 | {true, true, true},
| |
| 99 | {false, true, false}
| |
| 100 | } | |
| 101 | ) | |
| 102 | ) | |
| 103 | .build(); | |
| 104 | private static final int BOARD_SIZE = 6; | |
| 105 | ||
| 106 | @SuppressWarnings("SuspiciousNameCombination")
| |
| 107 | public static void main(String[] args) {
| |
| 108 | LongStream shapesPosesStream = LongStream.of(0); | |
| 109 | AtomicInteger maxFail = new AtomicInteger(0); | |
| 110 | int i = 0; | |
| 111 | for (Shape shape : SHAPES) {
| |
| 112 | int finalI = i; | |
| 113 | shapesPosesStream = shapesPosesStream | |
| 114 | .flatMap(shapesPoses -> | |
| 115 | LongStream.rangeClosed(0, BOARD_SIZE - shape.height) | |
| 116 | .flatMap(y -> | |
| 117 | LongStream.rangeClosed(0, BOARD_SIZE - shape.width) | |
| 118 | .map(x -> x << 4 | y) | |
| 119 | ) | |
| 120 | .map(pos -> shapesPoses << 8 | pos) | |
| 121 | ) | |
| 122 | .filter(shapesPoses -> {
| |
| 123 | String[][] board = new String[BOARD_SIZE][BOARD_SIZE]; | |
| 124 | for (int j = 0; j <= finalI; j++) {
| |
| 125 | long pos = (shapesPoses >> ((finalI - j) * 8)) & 0b11111111; | |
| 126 | if (!SHAPES.get(j).fillBoard(board, (int) ((pos >> 4) & 0b1111), (int) (pos & 0b1111))) {
| |
| 127 | if (j > maxFail.get()) {
| |
| 128 | maxFail.set(j); | |
| 129 | } | |
| 130 | return false; | |
| 131 | } | |
| 132 | } | |
| 133 | return true; | |
| 134 | }); | |
| 135 | i++; | |
| 136 | } | |
| 137 | shapesPosesStream = shapesPosesStream.parallel(); | |
| 138 | List<String[][]> boards = shapesPosesStream | |
| 139 | .mapToObj(shapesPoses -> {
| |
| 140 | String[][] board = new String[BOARD_SIZE][BOARD_SIZE]; | |
| 141 | for (int j = 0; j < SHAPES.size(); j++) {
| |
| 142 | long pos = (shapesPoses >> ((SHAPES.size() - 1 - j) * 8)) & 0b11111111; | |
| 143 | if (!SHAPES.get(j).fillBoard(board, (int) ((pos >> 4) & 0b1111), (int) (pos & 0b1111))) {
| |
| 144 | throw new IllegalStateException(); | |
| 145 | } | |
| 146 | } | |
| 147 | return board; | |
| 148 | }) | |
| 149 | .collect(Collectors.toList()); | |
| 150 | if (boards.isEmpty()) {
| |
| 151 | System.out.println("Failed to place " + maxFail.get() + " shape");
| |
| 152 | } | |
| 153 | System.out.println( | |
| 154 | boards.stream() | |
| 155 | .map(board -> | |
| 156 | Arrays.stream(board) | |
| 157 | .map(ss -> | |
| 158 | Arrays.stream(ss) | |
| 159 | .map(s -> s == null ? "." : s) | |
| 160 | .collect(Collectors.joining(""))
| |
| 161 | ) | |
| 162 | .collect(Collectors.joining("\n"))
| |
| 163 | ) | |
| 164 | .collect(Collectors.joining("\n---\n"))
| |
| 165 | ); | |
| 166 | } | |
| 167 | ||
| 168 | private static final class Shape {
| |
| 169 | @SuppressWarnings("WeakerAccess")
| |
| 170 | public final String name; | |
| 171 | @SuppressWarnings("WeakerAccess")
| |
| 172 | public final int width; | |
| 173 | @SuppressWarnings("WeakerAccess")
| |
| 174 | public final int height; | |
| 175 | @SuppressWarnings("WeakerAccess")
| |
| 176 | public final boolean[][] data; | |
| 177 | ||
| 178 | @SuppressWarnings("WeakerAccess")
| |
| 179 | public Shape(String name, int width, int height, boolean[][] data) {
| |
| 180 | this.name = name; | |
| 181 | this.width = width; | |
| 182 | this.height = height; | |
| 183 | this.data = data; | |
| 184 | } | |
| 185 | ||
| 186 | @SuppressWarnings("WeakerAccess")
| |
| 187 | public boolean fillBoard(String[][] board, int startX, int startY) {
| |
| 188 | for (int y = 0; y < height; y++) {
| |
| 189 | for (int x = 0; x < width; x++) {
| |
| 190 | if (data[y][x]) {
| |
| 191 | if (board[startY + y][startX + x] != null) {
| |
| 192 | return false; | |
| 193 | } | |
| 194 | board[startY + y][startX + x] = name; | |
| 195 | } | |
| 196 | } | |
| 197 | } | |
| 198 | return true; | |
| 199 | } | |
| 200 | } | |
| 201 | } |
