issue #43 1904

sowon-dev · sowon-dev · commit f87750d65d1a · 2021-07-01T23:30:34.000+09:00
diff --git a/src/backjoon/_1904.java b/src/backjoon/_1904.java
@@ -0,0 +1,43 @@
+package backjoon;
+// https://www.acmicpc.net/problem/1904
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class _1904 {
+  // 첫 번째 줄에 자연수 N이 주어진다. (1 ≤ N ≤ 1,000,000)
+  // memory 51820 runtime 264
+  public static int[] dp = new int[1000001];
+  public static void main(String[] args) throws IOException {
+    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    int N = Integer.parseInt(br.readLine());
+
+    //피보나치 수열
+    dp[0] = 0;
+    dp[1] = 1;
+    dp[2] = 2;
+
+    // -1로 초기화
+    for(int i=3; i < dp.length; i++ ){
+      dp[i] = -1;
+    }
+
+    System.out.println(Tile(N));
+  }
+
+  static int Tile(int n){
+    if(dp[n] == -1){
+      dp[n] = (Tile(n-1) + Tile(n-2)) % 15746;
+    }
+    return dp[n];
+  }
+
+}
+/*
+input
+4
+
+output
+5
+ */
