issue sowon-dev#44 2156

Author: sowon-dev

src/backjoon/_2156.java

@@ -0,0 +1,45 @@
+package backjoon;
+// https://www.acmicpc.net/problem/2156
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class _2156 {
+  public static void main(String[] args) throws IOException {
+
+    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    int N = Integer.parseInt(br.readLine());
+
+    int[] arr = new int[N+1];
+    int[] dp = new int[N+1];
+
+    for(int i = 1; i <= N; i++){
+      arr[i] = Integer.parseInt(br.readLine());
+    }
+
+    dp[1] = arr[1];
+    if (N > 1) {
+      dp[2] = arr[1] + arr[2];
+    }
+    for (int i = 3; i <= N; i++) {
+      dp[i] = Math.max(dp[i - 1], Math.max(dp[i - 2] + arr[i], dp[i - 3] + arr[i - 1] + arr[i]));
+
+    }
+    System.out.println(dp[N]);
+
+  }
+}
+/*
+input
+6
+6
+10
+13
+9
+8
+1
+
+output
+33
+ */