Merge pull request #1819 from AlgorithmWithGod/JHLEE325

[20260123] BOJ / G4 / 배열 돌리기 4 / 이준희

Author: ShinHeeEul

JHLEE325/202601/23 BOJ G4 배열 돌리기 4.md

@@ -0,0 +1,108 @@
+```java
+import java.io.*;
+import java.util.*;
+
+
+public class Main {
+    static int N, M, K;
+    static int[][] originalBoard;
+    static Operation[] ops;
+    static boolean[] visited;
+    static int[] p;
+    static int minVal = Integer.MAX_VALUE;
+
+    static class Operation {
+        int r, c, s;
+        Operation(int r, int c, int s) {
+            this.r = r; this.c = c; this.s = s;
+        }
+    }
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st = new StringTokenizer(br.readLine());
+
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+        K = Integer.parseInt(st.nextToken());
+
+        originalBoard = new int[N + 1][M + 1];
+        for (int i = 1; i <= N; i++) {
+            st = new StringTokenizer(br.readLine());
+            for (int j = 1; j <= M; j++) {
+                originalBoard[i][j] = Integer.parseInt(st.nextToken());
+            }
+        }
+
+        ops = new Operation[K];
+        for (int i = 0; i < K; i++) {
+            st = new StringTokenizer(br.readLine());
+            ops[i] = new Operation(
+                    Integer.parseInt(st.nextToken()),
+                    Integer.parseInt(st.nextToken()),
+                    Integer.parseInt(st.nextToken())
+            );
+        }
+
+        visited = new boolean[K];
+        p = new int[K];
+        permutation(0);
+
+        System.out.println(minVal);
+    }
+
+    static void permutation(int cnt) {
+        if (cnt == K) {
+            int[][] copyBoard = copy();
+            for (int i = 0; i < K; i++) {
+                rotate(copyBoard, ops[p[i]]);
+            }
+            calculateMin(copyBoard);
+            return;
+        }
+        for (int i = 0; i < K; i++) {
+            if (visited[i]) continue;
+            visited[i] = true;
+            p[cnt] = i;
+            permutation(cnt + 1);
+            visited[i] = false;
+        }
+    }
+
+    static void rotate(int[][] board, Operation op) {
+        int r = op.r;
+        int c = op.c;
+        int s = op.s;
+
+        for (int i = 1; i <= s; i++) {
+            int top = r - i;
+            int left = c - i;
+            int bottom = r + i;
+            int right = c + i;
+
+            int temp = board[top][left];
+
+            for (int row = top; row < bottom; row++) board[row][left] = board[row + 1][left];
+            for (int col = left; col < right; col++) board[bottom][col] = board[bottom][col + 1];
+            for (int row = bottom; row > top; row--) board[row][right] = board[row - 1][right];
+            for (int col = right; col > left + 1; col--) board[top][col] = board[top][col - 1];
+
+            board[top][left + 1] = temp;
+        }
+    }
+
+    static int[][] copy() {
+        int[][] res = new int[N + 1][M + 1];
+        for (int i = 1; i <= N; i++) res[i] = originalBoard[i].clone();
+        return res;
+    }
+
+    static void calculateMin(int[][] board) {
+        for (int i = 1; i <= N; i++) {
+            int sum = 0;
+            for (int j = 1; j <= M; j++) sum += board[i][j];
+            minVal = Math.min(minVal, sum);
+        }
+    }
+}
+```