[20250802] BOJ / G4 / 오큰수 / 이준희

JHLEE325/202508/02 BOJ G4 오큰수.md

@@ -0,0 +1,41 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringTokenizer st;
+
+        int n = Integer.parseInt(br.readLine());
+        int[] arr = new int[n];
+        int[] result = new int[n];
+        Stack<Integer> stk = new Stack<>();
+
+        st = new StringTokenizer(br.readLine());
+        for (int i = 0; i < n; i++) {
+            arr[i] = Integer.parseInt(st.nextToken());
+        }
+
+        for (int i = n - 1; i >= 0; i--) {
+            while (!stk.isEmpty()) {
+                if (stk.peek() > arr[i]) {
+                    result[i] = stk.peek();
+                    break;
+                } else stk.pop();
+            }
+            if (stk.isEmpty()) result[i] = -1;
+            stk.push(arr[i]);
+        }
+
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < n; i++) {
+            sb.append(result[i] + " ");
+        }
+
+        System.out.println(sb.toString());
+    }
+}
+
+```