[DP] baekjoon-12852

Author: Seogeurim

README.md

@@ -378,6 +378,7 @@
 | 31  |     | [SWEA-1952 수영장](src/DP/swea1952)                        |        |
 | 32  |     | [JUNGOL-1681 해밀턴 순환회로](./src/DP/jo1681)               |  TSP  |
 | 33  |     | [Baekjoon-2098 외판원 순회](./src/DP/P2098)                 |  TSP  |
+| 34  |     | [Baekjoon-12852 1로 만들기 2](./src/DP/P12852)              |        |
 
 ## Time Complexity
 

src/DP/P12852/Main.java

@@ -0,0 +1,36 @@
+package DP.P12852;
+
+import java.io.*;
+
+public class Main {
+
+    static int N;
+    static int[] cnt = new int[1000001], memo = new int[1000001];
+
+    public static void main(String[] args) throws Exception {
+        System.setIn(new FileInputStream("src/DP/P12852/input.txt"));
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        N = Integer.parseInt(br.readLine());
+        for (int i = 2; i <= N; i++) {
+            cnt[i] = cnt[i-1] + 1;
+            memo[i] = i-1;
+            if (i % 3 == 0 && cnt[i] > cnt[i/3] + 1) {
+                cnt[i] = cnt[i/3] + 1;
+                memo[i] = i/3;
+            }
+            if (i % 2 == 0 && cnt[i] > cnt[i/2] + 1) {
+                cnt[i] = cnt[i/2] + 1;
+                memo[i] = i/2;
+            }
+        }
+
+        StringBuilder sb = new StringBuilder();
+        sb.append(cnt[N]).append("\n");
+        while (N >= 1) {
+            sb.append(N).append(" ");
+            N = memo[N];
+        }
+        System.out.println(sb.toString());
+    }
+}

src/DP/P12852/README.md

@@ -0,0 +1,5 @@
+## [baekjoon-12852] 1로 만들기 2
+
+![image](https://user-images.githubusercontent.com/22045163/112117297-8e487780-8bfe-11eb-8f9b-5516059c6245.png)
+
+![image](https://user-images.githubusercontent.com/22045163/112117342-9ef8ed80-8bfe-11eb-84e7-10e6b908f4c7.png)

src/DP/P12852/input.txt

@@ -0,0 +1 @@
+10