[20250303] BOJ / G3 / 울타리 치기 / 권혁준

Author: oncsr

khj20006/202503/03 BOJ G3 울타리 치기.md

@@ -0,0 +1,50 @@
+```java
+
+import java.util.*;
+import java.io.*;
+
+
+class Main {
+	
+	// IO field
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+	static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+	static StringTokenizer st;
+
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static int nextInt() {return Integer.parseInt(st.nextToken());}
+	static long nextLong() {return Long.parseLong(st.nextToken());}
+	static void bwEnd() throws Exception {bw.flush();bw.close();}
+	
+	// Additional field
+	static long[] D;
+	static int N;
+	
+	public static void main(String[] args) throws Exception {
+		
+		ready();
+		solve();
+	
+		bwEnd();
+		
+	}
+	
+	static void ready() throws Exception{
+		
+		N = Integer.parseInt(br.readLine());
+		D = new long[1000001];
+		
+	}
+	
+	static void solve() throws Exception{
+
+		for(int i=1;i<=5;i++) D[i] = i;
+		D[6] = 7;
+		for(int i=7;i<=N;i++) D[i] = D[i-6] + i;
+		bw.write(D[N] + "\n");
+		
+	}
+	
+}
+
+```