阿里国际笔试 0902笔试

第二题Pokemon的题，想知道以下做法为什么不对，我没有超时，显示的答案错误，过了30%多

import java.util.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别

        int t = in.nextInt();
        int len, n, k, thing, time;
        for (int i = 0; i < t; i++) {
            len = in.nextInt();
            n = in.nextInt();
            k = in.nextInt();
            Map<Integer, Integer> map = new HashMap<>();
            List<Integer> things = new ArrayList<>();

            for (int j = 0; j < n; j++) {
                thing = in.nextInt();
                time = in.nextInt();
                if (thing > k) {
                    things.add(thing);
                    map.put(thing, time);
                }
            }
            things.sort((o1, o2) -> o1 - o2);
            solve(k, map, things);
        }

    }

    public static void solve(int k, Map<Integer, Integer> map, List<Integer> things) {
        boolean flag = true;

        long robot = 1;
        long pokemon = k;

        for (int next : things) {
            long distance = next - pokemon;
            pokemon += distance;
            robot += distance;
            int time = map.get(next);
            robot = robot + time;

            if (robot >= pokemon) {
                flag = false;
                break;
            }
        }

        if (flag) {
            System.out.println("YES");
        } else {
            System.out.println("NO");
        }
    }
}