#13 2630번 색종이 만들기

분할정복/2630_색종이 만들기.java

@@ -0,0 +1,61 @@
+package 분할정복;
+import java.util.*;
+import java.io.*;
+
+public class Main { 
+    static int[][] graph;
+    static int white=0;
+    static int blue=0;
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int N=Integer.parseInt(br.readLine());
+
+        graph= new int[N][N];
+        StringTokenizer st;
+
+        for(int i=0;i<N;i++){
+            st=new StringTokenizer(br.readLine()," ");
+            for(int j=0;j<N;j++)
+                graph[i][j]= Integer.parseInt(st.nextToken());
+        }
+
+        partition(0,0,N);
+
+        System.out.println(white);
+        System.out.println(blue);
+    }
+
+    public static void partition(int row, int col, int size) {
+        //색상 비교
+        if(colorCheck(row,col,size)) {
+            if(graph[row][col]==0)
+                white++;
+            else
+                blue++;
+            return;
+        }
+
+        int newSize=size/2; //절반 사이즈
+
+        partition(row, col, newSize);           //2사분면
+        partition(row, col+newSize, newSize);   //1사분면
+        partition(row + newSize, col, newSize); //3사분면
+        partition(row + newSize, col+newSize, newSize); //4사분면
+
+    }
+
+    //한 사분면에 색상 모두 같은 지 비교 함수
+    public static boolean colorCheck(int row, int col, int size){
+        int color=graph[row][col];
+
+        for (int i=row;i<row+size;i++){
+            for (int j=col;j<col+size;j++){
+                if (graph[i][j] != color)
+                    return false;
+            }
+        }
+        return true;
+    }
+
+}