题解 | 蛇鸟

import java.util.Arrays;
import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		// TODO 鸵鸟
//	获取输入
	Scanner sc = new Scanner(System.in);
	int n = sc.nextInt();
	int l = sc.nextInt();
//	设置数组
	int[] heights = new int[n];
	for (int i = 0; i < n; i++) {
		heights[i] = sc.nextInt(); 
	}
//	排序
	Arrays.sort(heights);
//	从最小开始吃
	for (int i = 0; i < n; i++) {
		if (heights[i] <= l) {
			l++;
		} else {
			break;
		} 
	}
	System.out.println(l);
	sc.close();
}

}