Method max

src/class131/Code03_CornField.java:42–50

(int x, int y)

	}

	public static int max(int x, int y) {
		int ans = 0;
		for (int i = x; i > 0; i -= i & -i) {
			for (int j = y; j > 0; j -= j & -j) {
				ans = Math.max(ans, tree[i][j]);
			}
		}
		return ans;
	}

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));