BufferedWriter

System.out.prinln() 대신

bw.write(); 를 사용한다

 

flush

close 해줄것

 

import java.io.*;
import java.util.Stack;

public class Main {
    public static void main(String[] args) throws IOException {

        // ISC - L1
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter printer = new BufferedWriter(new OutputStreamWriter(System.out));
        int N = Integer.parseInt(br.readLine());


        // ISC - L2
        String[] str = br.readLine().split(" ");
        int[] A = new int[N];
        for (int i = 0; i < N; i++) {
            A[i] = Integer.parseInt(str[i]);
        }
        int[] marker = new int[N];

        Stack<Integer> myStack = new Stack<>();

        // Operaitng Stacking in-out + marking
        myStack.push(0);
        for (int i = 1; i < N; i++) {
            while (!myStack.isEmpty() && A[myStack.peek()] < A[i]) {
                marker[myStack.peek()] = A[i];
            }
            myStack.push(i);
        }

        while (!myStack.isEmpty()) {
            marker[myStack.pop()] = -1;
        }

        // OEC
        for (int i = 0; i < N; i++) {
            printer.write(marker[i] + " ");
        }
        printer.write("\n");
        printer.flush();

    }
}