[20250716] BOJ / G5 / 탑 / 이강현

Author: lkhyun

lkhyun/202507/16 BOJ G5 탑.md

@@ -0,0 +1,45 @@
+```java
+import java.util.*;
+import java.io.*;
+
+public class Main{
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    static StringTokenizer st;
+    static int N;
+    static int[] tops;
+    static int[] reception;
+
+    public static void main(String[] args) throws Exception {
+        N = Integer.parseInt(br.readLine());
+        st = new StringTokenizer(br.readLine());
+        tops = new int[N+1];
+        reception = new int[N+1];
+
+        for (int i = 1; i <= N; i++) {
+            tops[i] = Integer.parseInt(st.nextToken());
+        }
+
+        ArrayDeque<int[]> stack = new ArrayDeque<>();
+        stack.push(new int[]{tops[N],N});
+
+        for (int i = N-1; i >= 1; i--) {
+            while(!stack.isEmpty() && tops[i] > stack.peek()[0]){
+                int[] top = stack.pop();
+                reception[top[1]] = i;
+            }
+            stack.push(new int[]{tops[i],i});
+        }
+
+        StringBuilder sb = new StringBuilder();
+        for (int i = 1; i <= N; i++) {
+            sb.append(reception[i]);
+            if(i != N){
+                sb.append(" ");
+            }
+        }
+        bw.write(sb.toString());
+        bw.close();
+    }
+}
+```