백준 10798 JAVA

import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        char[][] arr = new char[5][15];

        int max = 0;
        for (int i = 0; i < 5; i++) {
            String s = br.readLine();
            int lineLen = s.length();
            if (lineLen > max) {
                max = lineLen;
            }
            for (int j = 0; j < lineLen; j++) {
                arr[i][j] = s.charAt(j);
            }
        }

        for (int i = 0; i < max; i++) {
            for (int j = 0; j < 5; j++) {
                if (arr[j][i] == '\0') continue;
                bw.write(arr[j][i]);
            }
        }
        bw.flush();
    }
}