死于Sub3第一个点，Sub4最后一个点

#include <vector>
#include <iostream>
using namespace std;

int a[5010];
int sum[5010];
vector<int> cut;

int main()
{
	int n, k;
	cin >> n >> k;
	int ans = 0;
	cut.push_back(0);
	for (int i = 1; i <= n; i++)
	{
		cin >> a[i];
		if (a[i] == k)
		{
			cut.push_back(i);
		}
	}
	cut.push_back(n + 1);
	if (k == 0)
	{
		for (int i = 1; i <= n; i++)
		{
			if (a[i] != 0)
			{
				ans++;
			}
		}
		cout << ans;
		return 0;
	}
	if (k == 1)
	{
		for (int i = 1; i <= n; i++)
		{
			if (a[i] == 0)
			{
				ans++;
			}
		}
		cout << ans;
		return 0;
	}
	for (int x = 1; x < cut.size(); x++)
	{
		int sum_min = 10000;
		for (int i = 0; i < 5001; i++)
		{
			sum[i] = 0;
		}
		for (int i = cut[x - 1] + 1; i < cut[x]; i++)
		{
			sum[a[i]]++;
		}
		for (int i = 0; i < k; i++)
		{
			sum_min = min(sum[i], sum_min);
		}
		ans += sum_min;
	}
	cout << ans;
	return 0;
}

/*
10 5
0 0 1 1 2 2 3 3 4 4

*/

最后那组数据可以卡掉，不知道该怎么改