[20260223] BOJ / G4 / 배열 돌리기 4 / 김민진

Author: zinnnn37

zinnnn37/202602/23 BOJ G4 배열 돌리기 4.md

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+```java
+import java.io.*;
+import java.util.StringTokenizer;
+
+public class BJ_17406_배열_돌리기_4 {
+
+    private static final BufferedReader  br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter  bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    private static       StringTokenizer st;
+
+    private static int N, M, K, ans;
+    private static int[]   order;
+    private static int[][] matrix, ops;
+    private static boolean[] visited;
+
+    public static void main(String[] args) throws IOException {
+        init();
+        sol();
+        bw.write(ans + "\n");
+        bw.flush();
+        bw.close();
+    }
+
+    private static void init() throws IOException {
+        st = new StringTokenizer(br.readLine());
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+        K = Integer.parseInt(st.nextToken());
+        ans = Integer.MAX_VALUE;
+
+        matrix = new int[N][M];
+        for (int i = 0; i < N; i++) {
+            st = new StringTokenizer(br.readLine());
+            for (int j = 0; j < M; j++) {
+                matrix[i][j] = Integer.parseInt(st.nextToken());
+            }
+        }
+
+        ops = new int[K][3];
+        for (int i = 0; i < K; i++) {
+            st = new StringTokenizer(br.readLine());
+            ops[i][0] = Integer.parseInt(st.nextToken()) - 1;
+            ops[i][1] = Integer.parseInt(st.nextToken()) - 1;
+            ops[i][2] = Integer.parseInt(st.nextToken());
+        }
+
+        order = new int[K];
+        visited = new boolean[K];
+    }
+
+    private static void sol() throws IOException {
+        perm(0);
+    }
+
+    private static void perm(int depth) {
+        if (depth == K) {
+            int[][] tmp = new int[N][M];
+            for (int i = 0; i < N; i++) {
+                System.arraycopy(matrix[i], 0, tmp[i], 0, M);
+            }
+
+            // order 순서대로 회전
+            for (int i = 0; i < K; i++) {
+                int idx = order[i];
+                rotate(tmp, ops[idx][0], ops[idx][1], ops[idx][2]);
+            }
+
+            int minRowSum = Integer.MAX_VALUE;
+            for (int i = 0; i < N; i++) {
+                int sum = 0;
+                for (int j = 0; j < M; j++) {
+                    sum += tmp[i][j];
+                }
+                minRowSum = Math.min(minRowSum, sum);
+            }
+            ans = Math.min(ans, minRowSum);
+            return;
+        }
+
+        for (int i = 0; i < K; i++) {
+            if (!visited[i]) {
+                visited[i] = true;
+                order[depth] = i;
+                perm(depth + 1);
+                visited[i] = false;
+            }
+        }
+    }
+
+    private static void rotate(int[][] arr, int r, int c, int s) {
+        for (int l = 1; l <= s; l++) {
+            int top    = r - l;
+            int bottom = r + l;
+            int left   = c - l;
+            int right  = c + l;
+
+            int tmp = arr[top][left];
+
+            // 하 -> 상
+            for (int i = top; i < bottom; i++) {
+                arr[i][left] = arr[i + 1][left];
+            }
+            // 오 -> 왼
+            for (int j = left; j < right; j++) {
+                arr[bottom][j] = arr[bottom][j + 1];
+            }
+            // 상 -> 하
+            for (int i = bottom; i > top; i--) {
+                arr[i][right] = arr[i - 1][right];
+            }
+            // 왼 -> 오
+            for (int j = right; j > left + 1; j--) {
+                arr[top][j] = arr[top][j - 1];
+            }
+            arr[top][left + 1] = tmp;
+        }
+    }
+
+}
+```