[20251214] BOJ / G4 / 좁은 미술전시관 / 이종환

0224LJH/202512/14 BOJ 좁은 미술전시관.md

@@ -0,0 +1,79 @@
+```java
+import java.util.*;
+import java.io.*;
+
+public class Main {
+
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+    static int size, closeCnt, ans;
+    static int dp[][][];
+    static int arr[][];
+
+    public static void main(String[] args) throws IOException {
+        while(true) {
+        	init();
+            if (size == 0 && closeCnt ==0) break;
+            process();
+            print();
+        }
+
+    }
+
+    private static void init() throws IOException {
+
+        StringTokenizer st = new StringTokenizer(br.readLine());
+        size = Integer.parseInt(st.nextToken());
+        closeCnt = Integer.parseInt(st.nextToken());
+        ans = 0 ;
+        if (size == 0 )return;
+
+        dp = new int [size][3][closeCnt+1]; 
+        // dp[i][j][k]: i번째칸까지 와서 k번만큼 방을 닫았을 때의  최댓값. 이때 j는 마지막에 어디를 닫았느냐를 의미 (0: 왼쪽, 1:오른쪽, 2:안닫음)
+        arr = new int[size][2];
+
+
+        for (int i = 0; i < size; i++) {
+        	st = new StringTokenizer(br.readLine());
+        	for (int j = 0; j < 2; j++) {
+        		arr[i][j] = Integer.parseInt(st.nextToken());
+        	}
+        }
+
+
+
+    }
+
+    private static void process() {
+    	if (closeCnt != 0) {
+        	dp[0][0][1] = arr[0][1];
+        	dp[0][1][1] = arr[0][0];
+    	}
+
+    	dp[0][2][0] = arr[0][1] + arr[0][0];
+
+    	for (int i = 1; i < size; i++) {
+    		for (int j = 0; j <= closeCnt; j++) {
+    			dp[i][2][j] = Math.max( Math.max(dp[i-1][0][j],dp[i-1][1][j] ), dp[i-1][2][j]);
+    			if (dp[i][2][j] != 0) dp[i][2][j] += arr[i][0] + arr[i][1];
+
+    			if (j == 0) continue;
+    			dp[i][1][j] = Math.max(dp[i-1][1][j-1],dp[i-1][2][j-1]);
+    			if (dp[i][1][j] != 0) dp[i][1][j] += arr[i][0];
+
+    			dp[i][0][j] = Math.max(dp[i-1][0][j-1],dp[i-1][2][j-1]);
+    			if (dp[i][0][j] != 0) dp[i][0][j] += arr[i][1];
+
+    		}
+    	}
+    	System.out.println(dp[size-1][0][closeCnt] + " " + dp[size-1][1][closeCnt] + " " + dp[size-1][2][closeCnt]);
+    	ans = Math.max( Math.max(dp[size-1][0][closeCnt],dp[size-1][1][closeCnt]),dp[size-1][2][closeCnt]);
+
+    }
+
+
+    private static void print() {
+        System.out.println(ans);
+    }
+}
+```

0224LJH/202512/15 PGM 예상 대진표.md

@@ -0,0 +1,21 @@
+```java
+import java.io.*;
+import java.util.*;
+
+class Solution
+{
+    public int solution(int n, int a, int b)
+    {
+        int answer = 0;
+        a--;
+        b--;
+        while (a != b){
+            answer++;
+            a /= 2;
+            b /= 2;
+        }
+
+        return answer;
+    }
+}
+```