Ruby と Java で解く AtCoder ABC129 D 2次元配列 - Qiita

import java.util.*; class Main { public static void main(String[] args) { final Scanner sc = new Scanner(System.in); final int H = Integer.parseInt(sc.next()); final int W = Integer.parseInt(sc.next()); final char S[][] = new char[H+2][W+2]; for (int i=1; i<H+1; i++) { S[i] = ("#" + sc.next() + "#").toCharArray(); } sc.close(); for (int i=0; i<W+2; i++) { S[0][i] = '#'; S[H+1][i] = '#'; } int lr[]