public Main() { try { BufferedReader in; in = new BufferedReader(new InputStreamReader(System.in)); // Used for CCC int numLights = Integer.parseInt(in.readLine()); int[] states = new int[numLights]; for (int i = 0; i < numLights; i++) { states[i] = Integer.parseInt(in.readLine()); } ArrayDeque<Scenario> Q = new ArrayDeque<Scenario>(); HashMap<String, Integer> dp = new HashMap<String, Integer>(); int moves = 0; Q.addLast(new Scenario(states)); while (!Q.isEmpty()) { int size = Q.size(); for (int q = 0; q < size; q++) { Scenario temp = Q.removeFirst(); if (isEmpty(temp.states)) { System.out.println(moves); return; } else { for (int i = 0; i < temp.states.length; i++) { if (temp.states[i] == 0) { int[] newArr = Arrays.copyOf(temp.states, temp.states.length); newArr[i] = 1; newArr = fixArray(newArr); String arr = ""; for (int p = 0; p < newArr.length; p++) arr += newArr[p]; if (dp.get(arr) == null) { dp.put(arr, moves); Q.addLast(new Scenario(newArr)); } else { int val = dp.get(arr); if (val != 0 && moves < val) { dp.put(arr, moves); Q.addLast(new Scenario(newArr)); } } // outputArr(newArr); } } } } moves++; } } catch (IOException e) { System.out.println("IO: General"); } }
static void solve() { int r = in.nextInt(); int c = in.nextInt(); int sy = in.nextInt() - 1; int sx = in.nextInt() - 1; int gy = in.nextInt() - 1; int gx = in.nextInt() - 1; char[][] t = new char[r][c]; for (int i = 0; i < r; i++) { t[i] = in.next().toCharArray(); } ArrayDeque<int[]> que = new ArrayDeque<>(); BitSet visited = new BitSet(); que.add(new int[] {sy, sx, 0}); visited.set(sy * c + sx); int[] dx = {0, 1, 0, -1}; int[] dy = {1, 0, -1, 0}; int[][] dist = new int[r][c]; while (!que.isEmpty()) { int[] p = que.pollFirst(); int cy = p[0]; int cx = p[1]; int d = p[2]; dist[cy][cx] = d; for (int i = 0; i < 4; i++) { int ny = cy + dy[i]; int nx = cx + dx[i]; if (ny < 0 || nx < 0 || r <= ny || c <= nx) continue; if (visited.get(ny * c + nx) || t[ny][nx] == '#') continue; que.add(new int[] {ny, nx, d + 1}); visited.set(ny * c + nx); } } out.println(dist[gy][gx]); }