issue #43 1463 1로 만들기

sowon-dev · sowon-dev · commit 4ce69170154d · 2021-07-09T23:47:10.000+09:00
diff --git a/src/backjoon/_1463.java b/src/backjoon/_1463.java
@@ -0,0 +1,50 @@
+package backjoon;
+// https://www.acmicpc.net/problem/1463
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class _1463 {
+
+  static Integer[] dp;
+
+  public static void main(String[] args) throws IOException {
+    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+    int N = Integer.parseInt(br.readLine());
+
+    dp = new Integer[N+1];
+    dp[0] = dp[1] = 0;
+
+    System.out.println(makeOne(N));
+  }
+
+  static int makeOne(int n){
+    if(dp[n] == null){
+      // 6으로 나눠지는 경우
+      if(n%6 == 0){
+        dp[n] = Math.min(makeOne(n-1), Math.min(makeOne(n/3), makeOne(n/2))) + 1;
+      }
+      // 3으로만 나눠지는 경우
+      else if(n%3 == 0){
+        dp[n] = Math.min(makeOne(n/3), makeOne(n-1))+1;
+      }
+      // 2로만 나눠지는 경우
+      else if(n%2 == 0){
+        dp[n] = Math.min(makeOne(n/2), makeOne(n-1))+1;
+      }
+      // 빼기 1로만 되는 경우
+      else{
+        dp[n] = makeOne(n-1)+1;
+      }
+    }
+    return dp[n];
+  }
+}
+/*
+input
+10
+
+output
+3
+ */
